Draadsoorten

Twee van de meest voorkomende draadsoorten zijn de British en de Amerikaanse draaden.
Beide lijken er op elkaar maar zijn absolute anders.

Definities van de verschillende draadsoorten
NPT National Pipe Thread
FPT Female Pipe Thread
MPT Male Pipe Thread
PTF SAE short tape pipe thread
NPTF American National taper pipe thread for dryseal pressure-tight joints
NPSM American National straight pipe thread for mechanical joints
NPSI American National straight intermediate pipe thread

British buis draden
BSP draden wordt het meest toegepast. Van de BSP draden zijn twee types:
BSPT (Britisch Standard Pipe Taper) en BSPP (Britisch Standard Pipe Parallel)
BSPP draden zijn rechte (of parallele) draden. Om een verbinding drukvast te krijgen is hierbij een sluitring vereist.
BSPT draden zijn conisch, drukvaste verbindingen worden door de draadzelf gerealiseerd.

Deze draden kunnen ook worden aangeduid met een G (voor recht) en een R (voor conisch). De terminologie voor het gebruik van de G en R kent zijn origine in Duitsland (G voor Gaz (gas), omdat het oorspronkelijk werdt gebruikt voor gas verbindingen; en R for Rohr (ofwel buis).

Zie de onderstaande tabellen voor BSPP en BSPT buis maten en de corresponderende draden per inch.

British Standard Pipe Parallel Threads
BSF en BA

Parallel Pipe Size Pipe Diameter Size Threads Per Inch Tapping Drill Size
G 1/8″ 0.383″ 28 8.73 mm
G 1/4″ 0.518″ 19 11.8mm
G 3/8″ 0.656″ 19 15.25mm
G 1/2″ 0.825″ 14 19.05mm
G 5/8″ 0.902″ 14 21.0mm
G 3/4″ 1.041″ 14 24.5mm
G 1″ 1.309″ 11 30.75mm

British Standard Pipe Tapered Threads
NPT

Tapered Pipe Size Threads Per Inch Tapping Drill Size
R 1/8″ 28 8.4mm
R 1/4″ 19 11.2mm
R 3/8″ 19 14.75mm
R 1/2″ 14 18.25mm
R 3/4″ 14 23.75mm
R 1″ 11 30mm

Amerikaanse pijp draaden
Van de Amerikaanse draden zijn er twee veel voorkomend, de conische standaard (NPT) en de rechte (NPSM). De conische draaden worden gebruikt voor afdichten en koppellen, de rechte draden zijn alleen voor koppellen. The droge afsluitdraad (NPTF) maakt het mogelijk om te koppellen zonder aftedichten.




 

Er bestaan nog 3 minder gebruikte draaden, de GHT, de NST en de BSPT. de NPT en de NPTF draden zijn uitwisselbaar te gebruiken met afdichters als PTFE tape. Geen van de andere draden zijn zo uitwisselbaar te gebruiken. Female (vrouwelijke) NPT draden kunnen ook omschreven worden als FPT en male (mannelijke) NPT draden kunnen omschreven worden als MPT.

Buis maten refereren niet aan fysieke dimenties. De buiten diameter van elke buis of fitting moet gemeten en vergeleken worden met de tabel ter indentificatie.
Voorbeeld, een 3/4″NPT buis draad heeft een buiten diameter van 1.050 inch. Elke draad maat heeft een vast aantal draaden per inch (TPI). De 3/4″NPT buis draad heeft 14 draden per inch. Voor zowel TPI als de OD van de draad zijn benodigd voor indentificatie van de draad maat omdat verschillende maten dezelfde TPI hebben.

 

NPT Taper Thread Actual Diameter Threads per inch Tapping Drill Size
1/8 “ 0.405″ 27 R
1/4 “ 0.540″ 18 7/16″
3/8 “ 0.675″ 18 37/64″
1/2 “ 0.840″ 14 23/32″
3/4 “ 1.050″ 14 59/64″
1 “ 1.315″ 11½ 1- 5/32″

 

NPS Straight Thread Actual Diameter Threads per inch Tapping Drill Size
1/8 “ 0.405″ 27 S
1/4 “ 0.540″ 18 29/64″
3/8 “ 0.675″ 18 19/32″
1/2 “ 0.840″ 14 47/64″
3/4 “ 1.050″ 14 15/16″
1 “ 1.315″ 11½ 1- 3/16″

De verschillende schroefdraden
Gesorteerd op diameter gevolgd door pitch

 

Series Nominal
Size
Major Dia
in
Major Dia mm Pitch
tpi
Pitch
mm
Bolt
A/F in
Bolt
A/F mm
BA 25 BA 0.00984 0.25000 0.0700 0.0172 0.4375
BA 24 BA 0.01142 0.29000 0.0800 0.0200 0.5075
BA 23 BA 0.01299 0.33000 0.0900 0.0227 0.5775
BA 22 BA 0.01457 0.37000 0.1000 0.0255 0.6475
BA 21 BA 0.01654 0.42000 0.1100 0.0289 0.735
BA 20 BA 0.01890 0.48000 0.1200 0.0331 0.84
BA 19 BA 0.02126 0.54000 0.1400 0.0372 0.945
BA 18 BA 0.02441 0.62000 0.1500 0.0427 1.085
BA 17 BA 0.02756 0.70000 0.1700 0.0482 1.225
BA 16 BA 0.03110 0.79000 0.1900 0.0544 1.3825
BA 15 BA 0.03543 0.90000 0.2100 0.0620 1.575
Metric Fine M1 1.00000 0.2000
BA 14 BA 0.03937 1.00000 0.2300 0.0689 1.75
Metric Coarse M1 1.00000 0.2500
Metric Fine M1.1 1.10000 0.2000
Metric Coarse M1.1 1.10000 0.2500
Metric Fine M1.2 1.20000 0.2000
BA 13 BA 0.04724 1.20000 0.2500 0.0827 2.1
Metric Coarse M1.2 1.20000 0.2500
BA 12 BA 0.05118 1.30000 0.2800 0.0896 2.275
Metric Fine M1.4 1.40000 0.2000
Metric Coarse M1.4 1.40000 0.3000
BA 11 BA 0.05906 1.50000 0.3100 0.1033 2.625
UNF 0 UNF 0.06000 1.52400 80 0.3175
BS Whit 1/16 BSW 0.06250 1.58750 60 0.4233
Metric Fine M1.6 1.60000 0.2000 3.2
Metric Coarse M1.6 1.60000 0.3500 3.2
BA 10 BA 0.06693 1.70000 0.3500 0.1171 2.975
Metric Fine M1.8 1.80000 0.2000
Metric Coarse M1.8 1.80000 0.3500
UNF 1 UNF 0.07300 1.85420 72 0.3528
UNC 1 UNC 0.07300 1.85420 64 0.3969
BA 9 BA 0.07480 1.90000 0.3900 0.1309 3.325
Metric Fine M2 2.00000 0.2500 4
Metric Coarse M2 2.00000 0.4000 4
UNF 2 UNF 0.08600 2.18440 64 0.3969
UNC 2 UNC 0.08600 2.18440 56 0.4536
Metric Fine M2.2 2.20000 0.2500
BA 8 BA 0.08661 2.20000 0.4300 0.1516 3.85
Metric Coarse M2.2 2.20000 0.4500
BS Whit 3/32 BSW 0.09375 2.38125 48 0.5292
Metric Fine M2.5 2.50000 0.3500 5
Metric Coarse M2.5 2.50000 0.4500 5
BA 7 BA 0.09843 2.50000 0.4800 0.1722 4.375
UNF 3 UNF 0.09900 2.51460 56 0.4536
UNC 3 UNC 0.09900 2.51460 48 0.5292
BA 6 BA 0.11024 2.80000 0.5300 0.1929 4.9
UNF 4 UNF 0.11200 2.84480 48 0.5292
UNC 4 UNC 0.11200 2.84480 40 0.6350
Metric Fine M3 3.00000 0.3500 5.5
Metric Coarse M3 3.00000 0.5000 5.5
Whit Sp Fine 1/8 Fine 0.12500 3.17500 60 0.4233
BS Fine 1/8 BSF 0.12500 3.17500 48 0.5292
UNF 5 UNF 0.12500 3.17500 44 0.5773
BS Cycle 1/8 BSC 0.12500 3.17500 40 0.6350
BS Whit 1/8 BSW 0.12500 3.17500 40 0.6350
UNC 5 UNC 0.12500 3.17500 40 0.6350
BS Brass 1/8 BSB 0.12500 3.17500 26 0.9769
BA 5 BA 0.12598 3.20000 0.5900 0.2205 5.6
Metric Fine M3.5 3.50000 0.3500
Metric Coarse M3.5 3.50000 0.6000
UNF 6 UNF 0.13800 3.50520 40 0.6350
UNC 6 UNC 0.13800 3.50520 32 0.7938
BA 4 BA 0.14173 3.60000 0.6600 0.2480 6.3
Whit Sp Fine 5/32 Fine 0.15625 3.96875 60 0.4233
Model Eng 5/32 ME 0.15625 3.96875 40 0.6350
BS Cycle 5/32 BSC 0.15625 3.96875 32 0.7938
BS Whit 5/32 BSW 0.15625 3.96875 32 0.7938
BS Brass 5/32 BSB 0.15625 3.96875 26 0.9769
Metric Fine M4 4.00000 0.5000 7
Metric Coarse M4 4.00000 0.7000 7
BA 3 BA 0.16142 4.10000 0.7300 0.2825 7.175
UNF 8 UNF 0.16400 4.16560 36 0.7056
UNC 8 UNC 0.16400 4.16560 32 0.7938
Metric Fine M4.5 4.50000 0.5000
Metric Coarse M4.5 4.50000 0.7500
BA 2 BA 0.18504 4.70000 0.8100 0.3238 8.225
Whit Sp Fine 3/16 Fine 0.18750 4.76250 60 0.4233
Model Eng 3/16 ME 0.18750 4.76250 40 0.6350
BS Cycle 3/16 BSC 0.18750 4.76250 32 0.7938
BS Fine 3/16 BSF 0.18750 4.76250 32 0.7938
Model Eng 3/16 ME 0.18750 4.76250 32 0.7938
BS Brass 3/16 BSB 0.18750 4.76250 26 0.9769
BS Whit 3/16 BSW 0.18750 4.76250 24 1.0583
UNF 10 UNF 0.19000 4.82600 32 0.7938
UNC 10 UNC 0.19000 4.82600 24 1.0583
Metric Fine M5 5.00000 0.5000 8
Metric Coarse M5 5.00000 0.8000 8
BA 1 BA 0.20866 5.30000 0.9000 0.3652 9.275
UNEF 12 UNEF 0.21600 5.48640 32 0.7938
UNF 12 UNF 0.21600 5.48640 28 0.9071
UNC 12 UNC 0.21600 5.48640 24 1.0583
Model Eng 7/32 ME 0.21875 5.55625 40 0.6350
Model Eng 7/32 ME 0.21875 5.55625 32 0.7938
BS Fine 7/32 BSF 0.21875 5.55625 28 0.9071
BS Cycle 7/32 BSC 0.21875 5.55625 26 0.9769
BS Whit 7/32 BSW 0.21875 5.55625 24 1.0583
Metric Fine M6 6.00000 0.7500 10
BA 0 BA 0.23622 6.00000 1.0000 0.4134 10.5
Metric Coarse M6 6.00000 1.0000 10
Model Eng 1/4 ME 0.25000 6.35000 40 0.6350
Whit Sp 1/4 Whit 0.25000 6.35000 36 0.7056
Model Eng 1/4 ME 0.25000 6.35000 32 0.7938
UNEF 1/4 UNEF 0.25000 6.35000 32 0.7938
Whit Sp 1/4 Whit 0.25000 6.35000 30 0.8467
UNF 1/4 UNF 0.25000 6.35000 28 0.9071 0.4375 11.1125
BS Brass 1/4 BSB 0.25000 6.35000 26 0.9769
BS Cycle 1/4 BSC 0.25000 6.35000 26 0.9769
BS Fine 1/4 BSF 0.25000 6.35000 26 0.9769 0.4450 11.303
Whit Sp 1/4 Whit 0.25000 6.35000 25 1.0160
Whit Sp 1/4 Whit 0.25000 6.35000 24 1.0583
BS Whit 1/4 BSW 0.25000 6.35000 20 1.2700 0.4450 11.303
UNC 1/4 UNC 0.25000 6.35000 20 1.2700 0.4375 11.1125
BS Cycle 17/64 BSC 0.26563 6.74688 26 0.9769
Metric Fine M7 7.00000 0.7500
Metric Coarse M7 7.00000 1.0000
Model Eng 9/32 ME 0.28125 7.14375 40 0.6350
Model Eng 9/32 ME 0.28125 7.14375 32 0.7938
BS Cycle 9/32 BSC 0.28125 7.14375 26 0.9769
BS Fine 9/32 BSF 0.28125 7.14375 26 0.9769
BS Whit 9/32 BSW 0.28125 7.14375 20 1.2700
Whit Sp 9/32 Whit 0.28125 7.14375 20 1.2700
BS Pipe G 1/16 0.30400 7.72160 28 0.9071
Model Eng 5/16 ME 0.31250 7.93750 40 0.6350
Model Eng 5/16 ME 0.31250 7.93750 32 0.7938
UNEF 5/16 UNEF 0.31250 7.93750 32 0.7938
Whit Sp 5/16 Whit 0.31250 7.93750 30 0.8467
BS Brass 5/16 BSB 0.31250 7.93750 26 0.9769
BS Cycle 5/16 BSC 0.31250 7.93750 26 0.9769
UNF 5/16 UNF 0.31250 7.93750 24 1.0583 0.5000 12.7
Whit Sp 5/16 Whit 0.31250 7.93750 24 1.0583
BS Fine 5/16 BSF 0.31250 7.93750 22 1.1545 0.5250 13.335
Whit Sp 5/16 Whit 0.31250 7.93750 20 1.2700
BS Whit 5/16 BSW 0.31250 7.93750 18 1.4111 0.5250 13.335
UNC 5/16 UNC 0.31250 7.93750 18 1.4111 0.5000 12.7
Metric Fine M8 8.00000 1.0000 13
Metric Coarse M8 8.00000 1.2500 13
Metric Coarse M9 9.00000 1.2500
Model Eng 3/8 ME 0.37500 9.52500 40 0.6350
Model Eng 3/8 ME 0.37500 9.52500 32 0.7938
UNEF 3/8 UNEF 0.37500 9.52500 32 0.7938
BS Brass 3/8 BSB 0.37500 9.52500 26 0.9769
BS Cycle 3/8 BSC 0.37500 9.52500 26 0.9769
UNF 3/8 UNF 0.37500 9.52500 24 1.0583 0.5625 14.2875
Whit Sp 3/8 Whit 0.37500 9.52500 24 1.0583
BS Fine 3/8 BSF 0.37500 9.52500 20 1.2700 0.6000 15.24
BS Whit 3/8 BSW 0.37500 9.52500 16 1.5875 0.6000 15.24
UNC 3/8 UNC 0.37500 9.52500 16 1.5875 0.5625 14.2875
BS Pipe G 1/8 0.38300 9.72820 28 0.9071
Metric Fine M10 10.00000 1.2500 17
Metric Coarse M10 10.00000 1.5000 17
Metric Fine M11 11.00000 1.2500
Metric Coarse M11 11.00000 1.5000
UNEF 7/16 UNEF 0.43750 11.11250 28 0.9071
BS Cycle 7/16 BSC 0.43750 11.11250 26 0.9769
UNF 7/16 UNF 0.43750 11.11250 20 1.2700 0.6250 15.875
BS Fine 7/16 BSF 0.43750 11.11250 18 1.4111 0.7100 18.034
BS Whit 7/16 BSW 0.43750 11.11250 14 1.8143 0.7100 18.034
UNC 7/16 UNC 0.43750 11.11250 14 1.8143 0.6250 15.875
Metric Fine M12 12.00000 1.2500 19
Metric Coarse M12 12.00000 1.7500 19
UNEF 1/2 UNEF 0.50000 12.70000 28 0.9071
BS Cycle 1/2 BSC 0.50000 12.70000 26 0.9769
UNF 1/2 UNF 0.50000 12.70000 20 1.2700 0.7500 19.05
BS Fine 1/2 BSF 0.50000 12.70000 16 1.5875 0.8200 20.828
UNC 1/2 UNC 0.50000 12.70000 13 1.9538 0.7500 19.05
BS Whit 1/2 BSW 0.50000 12.70000 12 2.1167 0.8200 20.828
BS Pipe G 1/4 0.51800 13.15720 19 1.3368
Metric Fine M14 14.00000 1.5000 22
Metric Coarse M14 14.00000 2.0000 22
BS Cycle 9/16 BSC 0.56250 14.28750 26 0.9769
UNEF 9/16 UNEF 0.56250 14.28750 24 1.0583
UNF 9/16 UNF 0.56250 14.28750 18 1.4111 0.8125 20.6375
BS Fine 9/16 BSF 0.56250 14.28750 16 1.5875 0.9200 23.368
BS Whit 9/16 BSW 0.56250 14.28750 12 2.1167 0.9200 23.368
UNC 9/16 UNC 0.56250 14.28750 12 2.1167 0.8125 20.6375
BS Cycle 5/8 BSC 0.62500 15.87500 26 0.9769
UNEF 5/8 UNEF 0.62500 15.87500 24 1.0583
UNF 5/8 UNF 0.62500 15.87500 18 1.4111 0.9375 23.8125
BS Fine 5/8 BSF 0.62500 15.87500 14 1.8143 1.0100 25.654
BS Whit 5/8 BSW 0.62500 15.87500 11 2.3091 1.0100 25.654
UNC 5/8 UNC 0.62500 15.87500 11 2.3091 0.9375 23.8125
Metric Fine M16 16.00000 1.5000 24
Metric Coarse M16 16.00000 2.0000 24
BS Pipe G 3/8 0.65600 16.66240 19 1.3368
BS Cycle 11/16 BSC 0.68750 17.46250 26 0.9769
UNEF 11/16 UNEF 0.68750 17.46250 24 1.0583
BS Fine 11/16 BSF 0.68750 17.46250 14 1.8143
BS Whit 11/16 BSW 0.68750 17.46250 11 2.3091
Metric Fine M18 18.00000 1.5000 27
Metric Coarse M18 18.00000 2.5000 27
BS Cycle 3/4 BSC 0.75000 19.05000 26 0.9769
UNEF 3/4 UNEF 0.75000 19.05000 20 1.2700
UNF 3/4 UNF 0.75000 19.05000 16 1.5875 1.1250 28.575
BS Fine 3/4 BSF 0.75000 19.05000 12 2.1167 1.2000 30.48
BS Whit 3/4 BSW 0.75000 19.05000 10 2.5400 1.2000 30.48
UNC 3/4 UNC 0.75000 19.05000 10 2.5400 1.1250 28.575
Metric Fine M20 20.00000 1.5000 30
Metric Coarse M20 20.00000 2.5000 30
UNEF 13/16 UNEF 0.81250 20.63750 20 1.2700
BS Pipe G 1/2 0.82500 20.95500 14 1.8143
Metric Fine M22 22.00000 1.5000 32
Metric Coarse M22 22.00000 2.5000 32
BS Cycle 7/8 BSC 0.87500 22.22500 24 1.0583
UNEF 7/8 UNEF 0.87500 22.22500 20 1.2700
UNF 7/8 UNF 0.87500 22.22500 14 1.8143 1.3125 33.3375
BS Fine 7/8 BSF 0.87500 22.22500 11 2.3091 1.3000 33.02
BS Whit 7/8 BSW 0.87500 22.22500 9 2.8222 1.3000 33.02
UNC 7/8 UNC 0.87500 22.22500 9 2.8222 1.3125 33.3375
BS Pipe G 5/8 0.90200 22.91080 14 1.8143
UNEF 15/16 UNEF 0.93750 23.81250 20 1.2700
Metric Fine M24 24.00000 2.0000 36
Metric Coarse M24 24.00000 3.0000 36
BS Cycle 31/32 BSC 0.96875 24.60625 30 0.8467
Unified 1-32 UN 1.00000 25.40000 32 0.7938
BS Cycle 1 BSC 1.00000 25.40000 24 1.0583
UNEF 1 UNEF 1.00000 25.40000 20 1.2700
UNF 1 UNF 1.00000 25.40000 12 2.1167 1.5000 38.1
BS Fine 1 BSF 1.00000 25.40000 10 2.5400 1.4800 37.592
BS Whit 1 BSW 1.00000 25.40000 8 3.1750 1.4800 37.592
UNC 1 UNC 1.00000 25.40000 8 3.1750 1.5000 38.1
BS Pipe G 3/4 1.04100 26.44140 14 1.8143
UNEF 1-1/16 UNEF 1.06250 26.98750 18 1.4111
Metric Fine M27 27.00000 2.0000 41
Metric Coarse M27 27.00000 3.0000 41
BS Cycle 1-1/8 BSC 1.12500 28.57500 26 0.9769
UNEF 1-1/8 UNEF 1.12500 28.57500 18 1.4111
UNF 1-1/8 UNF 1.12500 28.57500 12 2.1167
BS Fine 1-1/8 BSF 1.12500 28.57500 9 2.8222 1.6700 42.418
BS Whit 1-1/8 BSW 1.12500 28.57500 7 3.6286 1.6700 42.418
UNC 1-1/8 UNC 1.12500 28.57500 7 3.6286 1.6875 42.8625
Metric Fine M30 30.00000 2.0000 46
Metric Coarse M30 30.00000 3.5000 46
UNEF 1-3/16 UNEF 1.18750 30.16250 18 1.4111
BS Pipe G 7/8 1.18900 30.20060 14 1.8143
UNEF 1-1/4 UNEF 1.25000 31.75000 18 1.4111
UNF 1-1/4 UNF 1.25000 31.75000 12 2.1167
BS Fine 1-1/4 BSF 1.25000 31.75000 9 2.8222 1.8600 47.244
BS Whit 1-1/4 BSW 1.25000 31.75000 7 3.6286 1.8600 47.244
UNC 1-1/4 UNC 1.25000 31.75000 7 3.6286 1.8750 47.625
BS Cycle 1.290 BSC 1.29000 32.76600 24 1.0583
Metric Fine M33 33.00000 2.0000 50
Metric Coarse M33 33.00000 3.5000 50
BS Pipe G 1 1.30900 33.24860 11 2.3091
UNEF 1-5/16 UNEF 1.31250 33.33750 18 1.4111
BS Cycle 1.370 BSC 1.37000 34.79800 24 1.0583
UNEF 1-3/8 UNEF 1.37500 34.92500 18 1.4111
UNF 1-3/8 UNF 1.37500 34.92500 12 2.1167
BS Fine 1-3/8 BSF 1.37500 34.92500 8 3.1750 2.0500 52.07
UNC 1-3/8 UNC 1.37500 34.92500 6 4.2333 2.0625 52.3875
BS Whit 1-3/8 BSW 1.37500 34.92500 2.0500 52.07
Metric Fine M36 36.00000 3.0000 55
Metric Coarse M36 36.00000 4.0000 55
UNEF 1-7/16 UNEF 1.43750 36.51250 18 1.4111
BS Cycle 1.450 BSC 1.45000 36.83000 26 0.9769
BS Pipe G 1-1/8 1.49200 37.89680 11 2.3091
UNEF 1-1/2 UNEF 1.50000 38.10000 18 1.4111
UNF 1-1/2 UNF 1.50000 38.10000 12 2.1167
BS Fine 1-1/2 BSF 1.50000 38.10000 8 3.1750 2.2200 56.388
BS Whit 1-1/2 BSW 1.50000 38.10000 6 4.2333 2.2200 56.388
UNC 1-1/2 UNC 1.50000 38.10000 6 4.2333 2.2500 57.15
Metric Fine M39 39.00000 3.0000 60
Metric Coarse M39 39.00000 4.0000 60
BS Cycle 1-9/16 BSC 1.56250 39.68750 24 1.0583
UNEF 1-9/16 UNEF 1.56250 39.68750 18 1.4111
BS Cycle 1-5/8 BSC 1.62500 41.27500 24 1.0583
UNEF 1-5/8 UNEF 1.62500 41.27500 18 1.4111
BS Fine 1-5/8 BSF 1.62500 41.27500 8 3.1750 2.4100 61.214
BS Whit 1-5/8 BSW 1.62500 41.27500 2.4100 61.214
BS Pipe G 1-1/4 1.65000 41.91000 11 2.3091
Metric Fine M42 42.00000 3.0000 65
Metric Coarse M42 42.00000 4.5000 65
UNEF 1-11/16 UNEF 1.68750 42.86250 18 1.4111
BS Fine 1-3/4 BSF 1.75000 44.45000 7 3.6286 2.5800 65.532
BS Whit 1-3/4 BSW 1.75000 44.45000 5 5.0800 2.5800 65.532
UNC 1-3/4 UNC 1.75000 44.45000 5 5.0800 2.6250 66.675
Metric Fine M45 45.00000 3.0000 70
Metric Coarse M45 45.00000 4.5000 70
BS Pipe G 1-1/2 1.88200 47.80280 11 2.3091
Metric Fine M48 48.00000 3.0000 75
Metric Coarse M48 48.00000 5.0000 75
BS Fine 2 BSF 2.00000 50.80000 7 3.6286 2.7600 70.104
BS Whit 2 BSW 2.00000 50.80000 4.5 5.6444 2.7600 70.104
UNC 2 UNC 2.00000 50.80000 4.5 5.6444 3.0000 76.2
Metric Coarse M52 52.00000 5.0000 80
BS Pipe G 1-3/4 2.11600 53.74640 11 2.3091
Metric Fine M56 56.00000 4.0000 85
Metric Coarse M56 56.00000 5.5000 85
BS Fine 2-1/4 BSF 2.25000 57.15000 6 4.2333 3.1500 80.01
UNC 2-1/4 UNC 2.25000 57.15000 4.5 5.6444
BS Whit 2-1/4 BSW 2.25000 57.15000 4 6.3500 3.1500 80.01
BS Pipe G 2 2.34700 59.61380 11 2.3091
Metric Fine M60 60.00000 4.0000 90
Metric Coarse M60 60.00000 5.5000 90
BS Fine 2-1/2 BSF 2.50000 63.50000 6 4.2333 3.5500 90.17
BS Whit 2-1/2 BSW 2.50000 63.50000 4 6.3500 3.5500 90.17
UNC 2-1/2 UNC 2.50000 63.50000 4 6.3500
Metric Fine M64 64.00000 4.0000 95
Metric Coarse M64 64.00000 6.0000 95
BS Pipe G 2-1/4 2.58700 65.70980 11 2.3091
Metric Coarse M68 68.00000 6.0000 100
BS Fine 2-3/4 BSF 2.75000 69.85000 6 4.2333 3.8900 98.806
UNC 2-3/4 UNC 2.75000 69.85000 4 6.3500
BS Whit 2-3/4 BSW 2.75000 69.85000 3.5 7.2571 3.8900 98.806
BS Pipe G 2-1/2 2.96000 75.18400 11 2.3091
BS Fine 3 BSF 3.00000 76.20000 5 5.0800 4.1800 106.172
UNC 3 UNC 3.00000 76.20000 4 6.3500
BS Whit 3 BSW 3.00000 76.20000 3.5 7.2571 4.1800 106.172
BS Pipe G 2-3/4 3.21000 81.53400 11 2.3091
BS Fine 3-1/4 BSF 3.25000 82.55000 5 5.0800 4.5300 115.062
UNC 3-1/4 UNC 3.25000 82.55000 4 6.3500
BS Whit 3-1/4 BSW 3.25000 82.55000 3.25 7.8154 4.5300 115.062
BS Pipe G 3 3.46000 87.88400 11 2.3091
BS Fine 3-1/2 BSF 3.50000 88.90000 4.5 5.6444 4.8500 123.19
UNC 3-1/2 UNC 3.50000 88.90000 4 6.3500
BS Whit 3-1/2 BSW 3.50000 88.90000 3.25 7.8154 4.8500 123.19
BS Fine 3-3/4 BSF 3.75000 95.25000 4.5 5.6444 5.1800 131.572
UNC 3-3/4 UNC 3.75000 95.25000 4 6.3500
BS Whit 3-3/4 BSW 3.75000 95.25000 3 8.4667 5.1800 131.572
BS Pipe G 3-1/2 3.95000 100.33000 11 2.3091

Twee van de meest voorkomende draadsoorten zijn de British en de Amerikaanse draaden.
Beide lijken er op elkaar maar zijn absolute anders.

Definities van de verschillende draadsoorten
NPT National Pipe Thread
FPT Female Pipe Thread
MPT Male Pipe Thread
PTF SAE short tape pipe
thread
NPTF American National taper
pipe thread for dryseal pressure-tight joints
NPSM American National
straight pipe thread for mechanical joints
NPSI American National
straight intermediate pipe thread

British buis draden
BSP draden wordt het meest toegepast. Van de BSP draden zijn twee types:
BSPT (Britisch Standard Pipe Taper) en BSPP (Britisch Standard Pipe Parallel)
BSPP draden zijn rechte (of parallele) draden. Om een verbinding drukvast te krijgen is hierbij een sluitring vereist.
BSPT draden zijn conisch, drukvaste verbindingen worden door de draadzelf gerealiseerd.

Deze draden kunnen ook worden aangeduid met een G (voor recht) en een R (voor conisch). De terminologie voor het gebruik van de G en R kent zijn origine in Duitsland (G voor Gaz (gas), omdat het oorspronkelijk werdt gebruikt voor gas verbindingen; en R for Rohr (ofwel buis).

Zie de onderstaande tabellen voor BSPP en BSPT buis maten en de corresponderende draden per inch.

British Standard Pipe Parallel Threads
BSF en BA

Parallel Pipe Size Pipe Diameter Size Threads Per Inch Tapping Drill Size
G 1/8″ 0.383″ 28 8.73 mm
G 1/4″ 0.518″ 19 11.8mm
G 3/8″ 0.656″ 19 15.25mm
G 1/2″ 0.825″ 14 19.05mm
G 5/8″ 0.902″ 14 21.0mm
G 3/4″ 1.041″ 14 24.5mm
G 1″ 1.309″ 11 30.75mm

British Standard Pipe Tapered Threads
NPT

Tapered Pipe Size Threads Per Inch Tapping Drill Size
R 1/8″ 28 8.4mm
R 1/4″ 19 11.2mm
R 3/8″ 19 14.75mm
R 1/2″ 14 18.25mm
R 3/4″ 14 23.75mm
R 1″ 11 30mm

Amerikaanse pijp draaden
Van de Amerikaanse draden zijn er twee veel voorkomend, de conische standaard (NPT) en de rechte (NPSM). De conische draaden worden gebruikt voor afdichten en koppellen, de rechte draden zijn alleen voor koppellen. The droge afsluitdraad (NPTF) maakt het mogelijk om te koppellen zonder aftedichten.




 

Er bestaan nog 3 minder gebruikte draaden, de GHT, de NST en de BSPT. de NPT en de NPTF draden zijn uitwisselbaar te gebruiken met afdichters als PTFE tape. Geen van de andere draden zijn zo uitwisselbaar te gebruiken. Female (vrouwelijke) NPT draden kunnen ook omschreven worden als FPT en male (mannelijke) NPT draden kunnen omschreven worden als MPT.

Buis maten refereren niet aan fysieke dimenties. De buiten diameter van elke buis of fitting moet gemeten en vergeleken worden met de tabel ter indentificatie.
Voorbeeld, een 3/4″NPT buis draad heeft een buiten diameter van 1.050 inch. Elke draad maat heeft een vast aantal draaden per inch (TPI). De 3/4″NPT buis draad heeft 14 draden per inch. Voor zowel TPI als de OD van de draad zijn benodigd voor indentificatie van de draad maat omdat verschillende maten dezelfde TPI hebben.

 

NPT Taper Thread Actual Diameter Threads per inch Tapping Drill Size
1/8 “ 0.405″ 27 R
1/4 “ 0.540″ 18 7/16″
3/8 “ 0.675″ 18 37/64″
1/2 “ 0.840″ 14 23/32″
3/4 “ 1.050″ 14 59/64″
1 “ 1.315″ 11½ 1- 5/32″

 

NPS Straight Thread Actual Diameter Threads per inch Tapping Drill Size
1/8 “ 0.405″ 27 S
1/4 “ 0.540″ 18 29/64″
3/8 “ 0.675″ 18 19/32″
1/2 “ 0.840″ 14 47/64″
3/4 “ 1.050″ 14 15/16″
1 “ 1.315″ 11½ 1- 3/16″

De verschillende schroefdraden
Gesorteerd op diameter gevolgd door pitch

 

Series Nominal
Size
Major Dia
in
Major Dia mm Pitch
tpi
Pitch
mm
Bolt
A/F in
Bolt
A/F mm
BA 25 BA 0.00984 0.25000 0.0700 0.0172 0.4375
BA 24 BA 0.01142 0.29000 0.0800 0.0200 0.5075
BA 23 BA 0.01299 0.33000 0.0900 0.0227 0.5775
BA 22 BA 0.01457 0.37000 0.1000 0.0255 0.6475
BA 21 BA 0.01654 0.42000 0.1100 0.0289 0.735
BA 20 BA 0.01890 0.48000 0.1200 0.0331 0.84
BA 19 BA 0.02126 0.54000 0.1400 0.0372 0.945
BA 18 BA 0.02441 0.62000 0.1500 0.0427 1.085
BA 17 BA 0.02756 0.70000 0.1700 0.0482 1.225
BA 16 BA 0.03110 0.79000 0.1900 0.0544 1.3825
BA 15 BA 0.03543 0.90000 0.2100 0.0620 1.575
Metric Fine M1 1.00000 0.2000
BA 14 BA 0.03937 1.00000 0.2300 0.0689 1.75
Metric Coarse M1 1.00000 0.2500
Metric Fine M1.1 1.10000 0.2000
Metric Coarse M1.1 1.10000 0.2500
Metric Fine M1.2 1.20000 0.2000
BA 13 BA 0.04724 1.20000 0.2500 0.0827 2.1
Metric Coarse M1.2 1.20000 0.2500
BA 12 BA 0.05118 1.30000 0.2800 0.0896 2.275
Metric Fine M1.4 1.40000 0.2000
Metric Coarse M1.4 1.40000 0.3000
BA 11 BA 0.05906 1.50000 0.3100 0.1033 2.625
UNF 0 UNF 0.06000 1.52400 80 0.3175
BS Whit 1/16 BSW 0.06250 1.58750 60 0.4233
Metric Fine M1.6 1.60000 0.2000 3.2
Metric Coarse M1.6 1.60000 0.3500 3.2
BA 10 BA 0.06693 1.70000 0.3500 0.1171 2.975
Metric Fine M1.8 1.80000 0.2000
Metric Coarse M1.8 1.80000 0.3500
UNF 1 UNF 0.07300 1.85420 72 0.3528
UNC 1 UNC 0.07300 1.85420 64 0.3969
BA 9 BA 0.07480 1.90000 0.3900 0.1309 3.325
Metric Fine M2 2.00000 0.2500 4
Metric Coarse M2 2.00000 0.4000 4
UNF 2 UNF 0.08600 2.18440 64 0.3969
UNC 2 UNC 0.08600 2.18440 56 0.4536
Metric Fine M2.2 2.20000 0.2500
BA 8 BA 0.08661 2.20000 0.4300 0.1516 3.85
Metric Coarse M2.2 2.20000 0.4500
BS Whit 3/32 BSW 0.09375 2.38125 48 0.5292
Metric Fine M2.5 2.50000 0.3500 5
Metric Coarse M2.5 2.50000 0.4500 5
BA 7 BA 0.09843 2.50000 0.4800 0.1722 4.375
UNF 3 UNF 0.09900 2.51460 56 0.4536
UNC 3 UNC 0.09900 2.51460 48 0.5292
BA 6 BA 0.11024 2.80000 0.5300 0.1929 4.9
UNF 4 UNF 0.11200 2.84480 48 0.5292
UNC 4 UNC 0.11200 2.84480 40 0.6350
Metric Fine M3 3.00000 0.3500 5.5
Metric Coarse M3 3.00000 0.5000 5.5
Whit Sp Fine 1/8 Fine 0.12500 3.17500 60 0.4233
BS Fine 1/8 BSF 0.12500 3.17500 48 0.5292
UNF 5 UNF 0.12500 3.17500 44 0.5773
BS Cycle 1/8 BSC 0.12500 3.17500 40 0.6350
BS Whit 1/8 BSW 0.12500 3.17500 40 0.6350
UNC 5 UNC 0.12500 3.17500 40 0.6350
BS Brass 1/8 BSB 0.12500 3.17500 26 0.9769
BA 5 BA 0.12598 3.20000 0.5900 0.2205 5.6
Metric Fine M3.5 3.50000 0.3500
Metric Coarse M3.5 3.50000 0.6000
UNF 6 UNF 0.13800 3.50520 40 0.6350
UNC 6 UNC 0.13800 3.50520 32 0.7938
BA 4 BA 0.14173 3.60000 0.6600 0.2480 6.3
Whit Sp Fine 5/32 Fine 0.15625 3.96875 60 0.4233
Model Eng 5/32 ME 0.15625 3.96875 40 0.6350
BS Cycle 5/32 BSC 0.15625 3.96875 32 0.7938
BS Whit 5/32 BSW 0.15625 3.96875 32 0.7938
BS Brass 5/32 BSB 0.15625 3.96875 26 0.9769
Metric Fine M4 4.00000 0.5000 7
Metric Coarse M4 4.00000 0.7000 7
BA 3 BA 0.16142 4.10000 0.7300 0.2825 7.175
UNF 8 UNF 0.16400 4.16560 36 0.7056
UNC 8 UNC 0.16400 4.16560 32 0.7938
Metric Fine M4.5 4.50000 0.5000
Metric Coarse M4.5 4.50000 0.7500
BA 2 BA 0.18504 4.70000 0.8100 0.3238 8.225
Whit Sp Fine 3/16 Fine 0.18750 4.76250 60 0.4233
Model Eng 3/16 ME 0.18750 4.76250 40 0.6350
BS Cycle 3/16 BSC 0.18750 4.76250 32 0.7938
BS Fine 3/16 BSF 0.18750 4.76250 32 0.7938
Model Eng 3/16 ME 0.18750 4.76250 32 0.7938
BS Brass 3/16 BSB 0.18750 4.76250 26 0.9769
BS Whit 3/16 BSW 0.18750 4.76250 24 1.0583
UNF 10 UNF 0.19000 4.82600 32 0.7938
UNC 10 UNC 0.19000 4.82600 24 1.0583
Metric Fine M5 5.00000 0.5000 8
Metric Coarse M5 5.00000 0.8000 8
BA 1 BA 0.20866 5.30000 0.9000 0.3652 9.275
UNEF 12 UNEF 0.21600 5.48640 32 0.7938
UNF 12 UNF 0.21600 5.48640 28 0.9071
UNC 12 UNC 0.21600 5.48640 24 1.0583
Model Eng 7/32 ME 0.21875 5.55625 40 0.6350
Model Eng 7/32 ME 0.21875 5.55625 32 0.7938
BS Fine 7/32 BSF 0.21875 5.55625 28 0.9071
BS Cycle 7/32 BSC 0.21875 5.55625 26 0.9769
BS Whit 7/32 BSW 0.21875 5.55625 24 1.0583
Metric Fine M6 6.00000 0.7500 10
BA 0 BA 0.23622 6.00000 1.0000 0.4134 10.5
Metric Coarse M6 6.00000 1.0000 10
Model Eng 1/4 ME 0.25000 6.35000 40 0.6350
Whit Sp 1/4 Whit 0.25000 6.35000 36 0.7056
Model Eng 1/4 ME 0.25000 6.35000 32 0.7938
UNEF 1/4 UNEF 0.25000 6.35000 32 0.7938
Whit Sp 1/4 Whit 0.25000 6.35000 30 0.8467
UNF 1/4 UNF 0.25000 6.35000 28 0.9071 0.4375 11.1125
BS Brass 1/4 BSB 0.25000 6.35000 26 0.9769
BS Cycle 1/4 BSC 0.25000 6.35000 26 0.9769
BS Fine 1/4 BSF 0.25000 6.35000 26 0.9769 0.4450 11.303
Whit Sp 1/4 Whit 0.25000 6.35000 25 1.0160
Whit Sp 1/4 Whit 0.25000 6.35000 24 1.0583
BS Whit 1/4 BSW 0.25000 6.35000 20 1.2700 0.4450 11.303
UNC 1/4 UNC 0.25000 6.35000 20 1.2700 0.4375 11.1125
BS Cycle 17/64 BSC 0.26563 6.74688 26 0.9769
Metric Fine M7 7.00000 0.7500
Metric Coarse M7 7.00000 1.0000
Model Eng 9/32 ME 0.28125 7.14375 40 0.6350
Model Eng 9/32 ME 0.28125 7.14375 32 0.7938
BS Cycle 9/32 BSC 0.28125 7.14375 26 0.9769
BS Fine 9/32 BSF 0.28125 7.14375 26 0.9769
BS Whit 9/32 BSW 0.28125 7.14375 20 1.2700
Whit Sp 9/32 Whit 0.28125 7.14375 20 1.2700
BS Pipe G 1/16 0.30400 7.72160 28 0.9071
Model Eng 5/16 ME 0.31250 7.93750 40 0.6350
Model Eng 5/16 ME 0.31250 7.93750 32 0.7938
UNEF 5/16 UNEF 0.31250 7.93750 32 0.7938
Whit Sp 5/16 Whit 0.31250 7.93750 30 0.8467
BS Brass 5/16 BSB 0.31250 7.93750 26 0.9769
BS Cycle 5/16 BSC 0.31250 7.93750 26 0.9769
UNF 5/16 UNF 0.31250 7.93750 24 1.0583 0.5000 12.7
Whit Sp 5/16 Whit 0.31250 7.93750 24 1.0583
BS Fine 5/16 BSF 0.31250 7.93750 22 1.1545 0.5250 13.335
Whit Sp 5/16 Whit 0.31250 7.93750 20 1.2700
BS Whit 5/16 BSW 0.31250 7.93750 18 1.4111 0.5250 13.335
UNC 5/16 UNC 0.31250 7.93750 18 1.4111 0.5000 12.7
Metric Fine M8 8.00000 1.0000 13
Metric Coarse M8 8.00000 1.2500 13
Metric Coarse M9 9.00000 1.2500
Model Eng 3/8 ME 0.37500 9.52500 40 0.6350
Model Eng 3/8 ME 0.37500 9.52500 32 0.7938
UNEF 3/8 UNEF 0.37500 9.52500 32 0.7938
BS Brass 3/8 BSB 0.37500 9.52500 26 0.9769
BS Cycle 3/8 BSC 0.37500 9.52500 26 0.9769
UNF 3/8 UNF 0.37500 9.52500 24 1.0583 0.5625 14.2875
Whit Sp 3/8 Whit 0.37500 9.52500 24 1.0583
BS Fine 3/8 BSF 0.37500 9.52500 20 1.2700 0.6000 15.24
BS Whit 3/8 BSW 0.37500 9.52500 16 1.5875 0.6000 15.24
UNC 3/8 UNC 0.37500 9.52500 16 1.5875 0.5625 14.2875
BS Pipe G 1/8 0.38300 9.72820 28 0.9071
Metric Fine M10 10.00000 1.2500 17
Metric Coarse M10 10.00000 1.5000 17
Metric Fine M11 11.00000 1.2500
Metric Coarse M11 11.00000 1.5000
UNEF 7/16 UNEF 0.43750 11.11250 28 0.9071
BS Cycle 7/16 BSC 0.43750 11.11250 26 0.9769
UNF 7/16 UNF 0.43750 11.11250 20 1.2700 0.6250 15.875
BS Fine 7/16 BSF 0.43750 11.11250 18 1.4111 0.7100 18.034
BS Whit 7/16 BSW 0.43750 11.11250 14 1.8143 0.7100 18.034
UNC 7/16 UNC 0.43750 11.11250 14 1.8143 0.6250 15.875
Metric Fine M12 12.00000 1.2500 19
Metric Coarse M12 12.00000 1.7500 19
UNEF 1/2 UNEF 0.50000 12.70000 28 0.9071
BS Cycle 1/2 BSC 0.50000 12.70000 26 0.9769
UNF 1/2 UNF 0.50000 12.70000 20 1.2700 0.7500 19.05
BS Fine 1/2 BSF 0.50000 12.70000 16 1.5875 0.8200 20.828
UNC 1/2 UNC 0.50000 12.70000 13 1.9538 0.7500 19.05
BS Whit 1/2 BSW 0.50000 12.70000 12 2.1167 0.8200 20.828
BS Pipe G 1/4 0.51800 13.15720 19 1.3368
Metric Fine M14 14.00000 1.5000 22
Metric Coarse M14 14.00000 2.0000 22
BS Cycle 9/16 BSC 0.56250 14.28750 26 0.9769
UNEF 9/16 UNEF 0.56250 14.28750 24 1.0583
UNF 9/16 UNF 0.56250 14.28750 18 1.4111 0.8125 20.6375
BS Fine 9/16 BSF 0.56250 14.28750 16 1.5875 0.9200 23.368
BS Whit 9/16 BSW 0.56250 14.28750 12 2.1167 0.9200 23.368
UNC 9/16 UNC 0.56250 14.28750 12 2.1167 0.8125 20.6375
BS Cycle 5/8 BSC 0.62500 15.87500 26 0.9769
UNEF 5/8 UNEF 0.62500 15.87500 24 1.0583
UNF 5/8 UNF 0.62500 15.87500 18 1.4111 0.9375 23.8125
BS Fine 5/8 BSF 0.62500 15.87500 14 1.8143 1.0100 25.654
BS Whit 5/8 BSW 0.62500 15.87500 11 2.3091 1.0100 25.654
UNC 5/8 UNC 0.62500 15.87500 11 2.3091 0.9375 23.8125
Metric Fine M16 16.00000 1.5000 24
Metric Coarse M16 16.00000 2.0000 24
BS Pipe G 3/8 0.65600 16.66240 19 1.3368
BS Cycle 11/16 BSC 0.68750 17.46250 26 0.9769
UNEF 11/16 UNEF 0.68750 17.46250 24 1.0583
BS Fine 11/16 BSF 0.68750 17.46250 14 1.8143
BS Whit 11/16 BSW 0.68750 17.46250 11 2.3091
Metric Fine M18 18.00000 1.5000 27
Metric Coarse M18 18.00000 2.5000 27
BS Cycle 3/4 BSC 0.75000 19.05000 26 0.9769
UNEF 3/4 UNEF 0.75000 19.05000 20 1.2700
UNF 3/4 UNF 0.75000 19.05000 16 1.5875 1.1250 28.575
BS Fine 3/4 BSF 0.75000 19.05000 12 2.1167 1.2000 30.48
BS Whit 3/4 BSW 0.75000 19.05000 10 2.5400 1.2000 30.48
UNC 3/4 UNC 0.75000 19.05000 10 2.5400 1.1250 28.575
Metric Fine M20 20.00000 1.5000 30
Metric Coarse M20 20.00000 2.5000 30
UNEF 13/16 UNEF 0.81250 20.63750 20 1.2700
BS Pipe G 1/2 0.82500 20.95500 14 1.8143
Metric Fine M22 22.00000 1.5000 32
Metric Coarse M22 22.00000 2.5000 32
BS Cycle 7/8 BSC 0.87500 22.22500 24 1.0583
UNEF 7/8 UNEF 0.87500 22.22500 20 1.2700
UNF 7/8 UNF 0.87500 22.22500 14 1.8143 1.3125 33.3375
BS Fine 7/8 BSF 0.87500 22.22500 11 2.3091 1.3000 33.02
BS Whit 7/8 BSW 0.87500 22.22500 9 2.8222 1.3000 33.02
UNC 7/8 UNC 0.87500 22.22500 9 2.8222 1.3125 33.3375
BS Pipe G 5/8 0.90200 22.91080 14 1.8143
UNEF 15/16 UNEF 0.93750 23.81250 20 1.2700
Metric Fine M24 24.00000 2.0000 36
Metric Coarse M24 24.00000 3.0000 36
BS Cycle 31/32 BSC 0.96875 24.60625 30 0.8467
Unified 1-32 UN 1.00000 25.40000 32 0.7938
BS Cycle 1 BSC 1.00000 25.40000 24 1.0583
UNEF 1 UNEF 1.00000 25.40000 20 1.2700
UNF 1 UNF 1.00000 25.40000 12 2.1167 1.5000 38.1
BS Fine 1 BSF 1.00000 25.40000 10 2.5400 1.4800 37.592
BS Whit 1 BSW 1.00000 25.40000 8 3.1750 1.4800 37.592
UNC 1 UNC 1.00000 25.40000 8 3.1750 1.5000 38.1
BS Pipe G 3/4 1.04100 26.44140 14 1.8143
UNEF 1-1/16 UNEF 1.06250 26.98750 18 1.4111
Metric Fine M27 27.00000 2.0000 41
Metric Coarse M27 27.00000 3.0000 41
BS Cycle 1-1/8 BSC 1.12500 28.57500 26 0.9769
UNEF 1-1/8 UNEF 1.12500 28.57500 18 1.4111
UNF 1-1/8 UNF 1.12500 28.57500 12 2.1167
BS Fine 1-1/8 BSF 1.12500 28.57500 9 2.8222 1.6700 42.418
BS Whit 1-1/8 BSW 1.12500 28.57500 7 3.6286 1.6700 42.418
UNC 1-1/8 UNC 1.12500 28.57500 7 3.6286 1.6875 42.8625
Metric Fine M30 30.00000 2.0000 46
Metric Coarse M30 30.00000 3.5000 46
UNEF 1-3/16 UNEF 1.18750 30.16250 18 1.4111
BS Pipe G 7/8 1.18900 30.20060 14 1.8143
UNEF 1-1/4 UNEF 1.25000 31.75000 18 1.4111
UNF 1-1/4 UNF 1.25000 31.75000 12 2.1167
BS Fine 1-1/4 BSF 1.25000 31.75000 9 2.8222 1.8600 47.244
BS Whit 1-1/4 BSW 1.25000 31.75000 7 3.6286 1.8600 47.244
UNC 1-1/4 UNC 1.25000 31.75000 7 3.6286 1.8750 47.625
BS Cycle 1.290 BSC 1.29000 32.76600 24 1.0583
Metric Fine M33 33.00000 2.0000 50
Metric Coarse M33 33.00000 3.5000 50
BS Pipe G 1 1.30900 33.24860 11 2.3091
UNEF 1-5/16 UNEF 1.31250 33.33750 18 1.4111
BS Cycle 1.370 BSC 1.37000 34.79800 24 1.0583
UNEF 1-3/8 UNEF 1.37500 34.92500 18 1.4111
UNF 1-3/8 UNF 1.37500 34.92500 12 2.1167
BS Fine 1-3/8 BSF 1.37500 34.92500 8 3.1750 2.0500 52.07
UNC 1-3/8 UNC 1.37500 34.92500 6 4.2333 2.0625 52.3875
BS Whit 1-3/8 BSW 1.37500 34.92500 2.0500 52.07
Metric Fine M36 36.00000 3.0000 55
Metric Coarse M36 36.00000 4.0000 55
UNEF 1-7/16 UNEF 1.43750 36.51250 18 1.4111
BS Cycle 1.450 BSC 1.45000 36.83000 26 0.9769
BS Pipe G 1-1/8 1.49200 37.89680 11 2.3091
UNEF 1-1/2 UNEF 1.50000 38.10000 18 1.4111
UNF 1-1/2 UNF 1.50000 38.10000 12 2.1167
BS Fine 1-1/2 BSF 1.50000 38.10000 8 3.1750 2.2200 56.388
BS Whit 1-1/2 BSW 1.50000 38.10000 6 4.2333 2.2200 56.388
UNC 1-1/2 UNC 1.50000 38.10000 6 4.2333 2.2500 57.15
Metric Fine M39 39.00000 3.0000 60
Metric Coarse M39 39.00000 4.0000 60
BS Cycle 1-9/16 BSC 1.56250 39.68750 24 1.0583
UNEF 1-9/16 UNEF 1.56250 39.68750 18 1.4111
BS Cycle 1-5/8 BSC 1.62500 41.27500 24 1.0583
UNEF 1-5/8 UNEF 1.62500 41.27500 18 1.4111
BS Fine 1-5/8 BSF 1.62500 41.27500 8 3.1750 2.4100 61.214
BS Whit 1-5/8 BSW 1.62500 41.27500 2.4100 61.214
BS Pipe G 1-1/4 1.65000 41.91000 11 2.3091
Metric Fine M42 42.00000 3.0000 65
Metric Coarse M42 42.00000 4.5000 65
UNEF 1-11/16 UNEF 1.68750 42.86250 18 1.4111
BS Fine 1-3/4 BSF 1.75000 44.45000 7 3.6286 2.5800 65.532
BS Whit 1-3/4 BSW 1.75000 44.45000 5 5.0800 2.5800 65.532
UNC 1-3/4 UNC 1.75000 44.45000 5 5.0800 2.6250 66.675
Metric Fine M45 45.00000 3.0000 70
Metric Coarse M45 45.00000 4.5000 70
BS Pipe G 1-1/2 1.88200 47.80280 11 2.3091
Metric Fine M48 48.00000 3.0000 75
Metric Coarse M48 48.00000 5.0000 75
BS Fine 2 BSF 2.00000 50.80000 7 3.6286 2.7600 70.104
BS Whit 2 BSW 2.00000 50.80000 4.5 5.6444 2.7600 70.104
UNC 2 UNC 2.00000 50.80000 4.5 5.6444 3.0000 76.2
Metric Coarse M52 52.00000 5.0000 80
BS Pipe G 1-3/4 2.11600 53.74640 11 2.3091
Metric Fine M56 56.00000 4.0000 85
Metric Coarse M56 56.00000 5.5000 85
BS Fine 2-1/4 BSF 2.25000 57.15000 6 4.2333 3.1500 80.01
UNC 2-1/4 UNC 2.25000 57.15000 4.5 5.6444
BS Whit 2-1/4 BSW 2.25000 57.15000 4 6.3500 3.1500 80.01
BS Pipe G 2 2.34700 59.61380 11 2.3091
Metric Fine M60 60.00000 4.0000 90
Metric Coarse M60 60.00000 5.5000 90
BS Fine 2-1/2 BSF 2.50000 63.50000 6 4.2333 3.5500 90.17
BS Whit 2-1/2 BSW 2.50000 63.50000 4 6.3500 3.5500 90.17
UNC 2-1/2 UNC 2.50000 63.50000 4 6.3500
Metric Fine M64 64.00000 4.0000 95
Metric Coarse M64 64.00000 6.0000 95
BS Pipe G 2-1/4 2.58700 65.70980 11 2.3091
Metric Coarse M68 68.00000 6.0000 100
BS Fine 2-3/4 BSF 2.75000 69.85000 6 4.2333 3.8900 98.806
UNC 2-3/4 UNC 2.75000 69.85000 4 6.3500
BS Whit 2-3/4 BSW 2.75000 69.85000 3.5 7.2571 3.8900 98.806
BS Pipe G 2-1/2 2.96000 75.18400 11 2.3091
BS Fine 3 BSF 3.00000 76.20000 5 5.0800 4.1800 106.172
UNC 3 UNC 3.00000 76.20000 4 6.3500
BS Whit 3 BSW 3.00000 76.20000 3.5 7.2571 4.1800 106.172
BS Pipe G 2-3/4 3.21000 81.53400 11 2.3091
BS Fine 3-1/4 BSF 3.25000 82.55000 5 5.0800 4.5300 115.062
UNC 3-1/4 UNC 3.25000 82.55000 4 6.3500
BS Whit 3-1/4 BSW 3.25000 82.55000 3.25 7.8154 4.5300 115.062
BS Pipe G 3 3.46000 87.88400 11 2.3091
BS Fine 3-1/2 BSF 3.50000 88.90000 4.5 5.6444 4.8500 123.19
UNC 3-1/2 UNC 3.50000 88.90000 4 6.3500
BS Whit 3-1/2 BSW 3.50000 88.90000 3.25 7.8154 4.8500 123.19
BS Fine 3-3/4 BSF 3.75000 95.25000 4.5 5.6444 5.1800 131.572
UNC 3-3/4 UNC 3.75000 95.25000 4 6.3500
BS Whit 3-3/4 BSW 3.75000 95.25000 3 8.4667 5.1800 131.572
BS Pipe G 3-1/2 3.95000 100.33000 11 2.3091