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Pipe Thread Compatibility

Thread Type Compatibility
BSPP British Standard Pipe Parallel
Male BSPP with Female BSPP
Female BSPP with Male BSPP
Female BSPP with Male BSPTr
BSPTr British Standard Pipe Taper
Male BSPTr with Female BSPTr
Male BSPTr with Female BSPP
Female BSPTr with Male BSPTr
Female BSPTr not compatible with Male BSPP
CHT American Standard Fire Hose Thread (1” National Hose Thread is Chemical Hose Thread, also known as Booster Hose Thread)
1” Male NH (NST) with 1” Female NH (NST)
1”Female NH (NST) with 1” Male NH (NST)
1” Thread is used on both 3/4” hose and 1” hose.
Not compatible with other systems
GHT Garden Hose Thread
Male GHT with Female GHT
Female GHT with Male GHT
Thread is same for all size hose
Not compatible with other systems
NH or NST American Standard Fire Hose Coupling Thread (National Hose thread also known as National StandardThread)
Male NH (NST) with Female NH (NST)
Female NH (NST) with Male NH (NST)
Not compatible with other systems
Thread pitch and diameters of fire threads may vary according to local and municipal regulations.
NPT American Standard Taper Pipe Thread (National Pipe Tapered)
Male NPT with Female NPT
Male NPT with Female NPTF
Male NPT with Female NPSM
Male NPT with Female NPSH
Female NPT with Male NPT
Female NPT with Male NPTF
Female NPT not compatible with Male NPSM or Male NPSH
NPTF American Standard Taper Pipe Fuel Dryseal Thread (National Pipe Tapered Fine)
Male NPTF with Female NPTF
Male NPTF with Female NPT
Male NPTF with Female NPSM
Male NPTF with Female NPSH
Female NPTF with Male NPTF
Female NPTF with Male NPT

Note: NPTF with NPTF threads do not require sealant for the initial use. After that, sealant is required.
NPSH American Standard Straight Pipe for Hose Couplings (National Pipe Straight Hose)
Male NPSH with Female NPSH
Female NPSH with Male NPSH
Female NPSH with Male NPT
Female NPSH with Male NPTF
Female NPSH with Male NPSM
NPSM American Standard Straight Mechanical Joints (National Pipe Straight Mechanical)
Male NPSM with Female NPSM
Male NPSM with Female NPSH
Female NPSM with Male NPSM
Female NPSM with Male NPT
Female NPSM with Male NPTF”, “Seal can be either mechanical or washer. Mating fittings must be of same type.
SIPT Straight Iron Pipe Thread
Generic name for Straight Pipe Thread
TIPT Tapered Iron Pipe Thread
Generic name for Tapered Pipe Thread

Drill Bit Conversion Charts

DECIMALWIRE No.METRIC
Drill Bit Conversion Charts
FRACTION
–0.0098–0.25
–0.0118–0.3
–0.013580–
–0.0138–0.35
–0.014579–
1/640.0156––
–0.0157–0.4
–0.01678–
–0.0177–0.45
–0.01877–
–0.0197–0.5
–0.0276–
–0.02175–
–0.0217–0.55
–0.022574–
–0.0236–0.6
–0.02473–
–0.02572–
–0.0256–0.65
–0.02671–
–0.0276–0.7
–0.02870–
–0.029269–
–0.0295–0.75
–0.03168–
1/320.0313––
–0.0315–0.8
–0.03267–
–0.03366–
–0.0335–0.85
–0.03565–
–0.0354–0.9
–0.03664–
–0.03763–
–0.0374–0.95
–0.03862–
–0.03961–
–0.0394–1
–0.0460–
–0.04159–
–0.04258–
–0.04357–
–0.0433–1.1
–0.046556–
3/640.0469––
–0.0472–1.2
–0.0512–1.3
–0.05255–
–0.05554–
–0.0551–1.4
–0.0591–1.5
–0.059553–
1/160.0625––
–0.063–1.6
–0.063552–
–0.0669–1.7
–0.06751–
–0.0750–
–0.0709–1.8
–0.07349–
–0.0748–1.9
–0.07648–
5/640.0781––
–0.078547–
–0.0787–2
–0.08146–
–0.08245–
–0.0827–2.1
–0.08644–
–0.0866–2.2
–0.08943–
–0.0906–2.3
–0.093542–
3/320.0938––
–0.0945–2.4
–0.09641–
–0.09840–
–0.0984–2.5
–0.099539–
–0.101538–
–0.1024–2.6
–0.10437–
–0.1063–2.7
–0.106536–
7/640.1094––
–0.1135–
–0.1102–2.8
–0.11134–
–0.11333–
–0.1142–2.9
–0.11632–
–0.1181–3
–0.1231–
1/80.125––
–0.128530–
–0.13629–
–0.1378–3.5
–0.140528–
9/640.1406––
–0.14427–
–0.14726–
–0.149525–
–0.15224–
–0.15423–
5/320.1563––
–0.15722–
–0.1575–4
–0.15921–
–0.16120–
–0.16619–
–0.169518–
11/640.1719––
–0.17317–
–0.17716–
–0.1772–4.5
–0.1815–
–0.18214–
–0.18513–
3/160.1875––
–0.18912–
–0.19111–
–0.193510–
–0.1969–
–0.1968–5
–0.1998–
–0.2017–
13/640.2031––
–0.2046–
–0.20555–
–0.2094–
–0.2133–
–0.2165–5.5
7/320.2188––
–0.2212–
–0.2281–
–0.234A–
15/640.2344––
–0.2362–6
–0.238B–
–0.242C–
–0.246D–
1/40.25E–
–0.2559–6.5
–0.257F–
–0.261G–
17/640.2656––
–0.266H–
–0.272I–
–0.2756–7
–0.277J–
–0.281K–
9/320.2813––
–0.29L–
–0.295M–
–0.2953–7.5
19/640.2969––
–0.302N–
5/160.3125––
–0.315–8
–0.316O–
–0.323P–
21/640.3281––
–0.332Q–
–0.3346–8.5
–0.339R–
11/320.3438––
–0.348S–
–0.3543–9
–0.358T–
23/640.3594––
–0.368U–
–0.374–9.5
3/80.375––
–0.377V–
–0.386W–
25/640.3906––
–0.3937–10
–0.397X–
–0.404Y–
13/320.4063––
–0.413Z–
–0.4134–10.5
27/640.4219––
–0.4331–11
7/160.4375––
0.4528–11.5
29/640.4531––
15/320.4688––
–0.4724–12
31/640.4844––
–0.4921–12.5
1/20.5––
–0.5118–13
33/640.5156––
17/320.5313––
–0.5315–13.5
35/640.5469––
–0.5512–14
9/160.5625––
–0.5709–14.5
37/640.5781––
–0.5905–15
19/320.5938––
39/640.6094––
–0.6102–15.5
11/160.625––
–0.6299–16
41/640.6406––
–0.6496–16.5
21/320.6563––
–0.6693–17
43/640.6719––
3/40.6875––
–0.689–17.5
45/640.7031––
–0.7087–18
23/320.7188––
–0.7283–18.5
47/640.7344––
–0.748–19
3/40.75––
49/640.7656––
–0.7677–19.5
25/320.7813––
–0.7874–20
51/640.7969––
–0.8071–20.5
13/160.8125––
–0.8268–21
53/640.8281––
27/320.8438––
–0.8465–21.5
55/640.8594––
–0.8661–22
7/80.875––
–0.8858–22.5
57/640.8906––
–0.9055–23
29/320.9063––
59/640.9219––
–0.9252–23.5
15/160.9375––
–0.9449–24
61/640.9531––
–0.9646–24.5
31/320.9688––
–0.9842–25
63/640.9844––
11––

Titanium Pipe sch 10

Pipe SizeOD (A)ID (B)WALL (C)
1/20.840.6740.083
3/41.050.8840.083
11.3151.0970.109
1-1/41.661.4420.109
1-1/21.91.6820.109
22.3752.1570.109
2-1/22.8752.6350.12
33.53.260.12
3-1/243.760.12
44.54.260.12
55.5635.2950.134
66.6256.3570.134
88.6258.3290.148
1010.7510.420.1651
1212.7512.390.18
141413.6240.188
1616.00115.6240.188
181817.6240.188
202019.5640.218
242423.50.25
303029.3750.313
363635.3750.313
424241.3750.313
484847.3750.313
Pipe Sizelb/ftgal/ft—
1/20.3860.019—
3/40.4930.032—
10.8080.049—
1-1/41.0390.085—
1-1/21.20.115—
21.5180.19—
2-1/22.0320.283—
32.4920.434—
3-1/22.8610.577—
43.230.74—
54.471.144—
65.3451.649—
87.7092.83—
100.7324.43—
1213.9046.263—
1415.9567.573—
1618.2679.96—
1820.57712.673—
2026.515.616—
2436.48622.532—
3057.00935.206—
3668.53151.057—
4280.05269.845—
4891.57491.571—

Titanium Pipe sch 5

Pipe SizeOD (A)ID (B)WALL (C)
1/20.840.710.065
3/41.050.920.065
11.3151.1850.065
1-1/41.661.530.065
1-1/21.91.770.065
22.3752.2450.065
2-1/22.8752.7090.083
33.53.3340.083
3-1/243.8340.083
44.54.3340.083
55.5635.3450.109
66.6256.4070.109
88.6258.4070.109
1010.7510.4820.134
1212.7512.4380.156
141413.6880.156
161615.670.1651
181817.670.165
202019.6240.188
242423.5640.218
303029.50.25
363635.50.25
424241.50.25
484847.50.25
Pipe Sizelb/ftgal/ft—
1/20.310.021—
3/40.3930.035—
10.4990.057—
1-1/40.6370.096—
1-1/20.7330.128—
20.9230.206—
2-1/21.4240.299—
31.7430.454—
3-1/21.9980.6—
42.2530.766—
53.6531.166—
64.3641.675—
85.7042.884—
108.744.483—
1212.076.312—
1413.277.644—
166.0610.018—
1818.0812.739—
2022.8915.712—
2431.8622.655—
3045.735.506—
3654.9251.418—
4264.1470.268—
4873.3692.055—

Titanium Pipe sch 80

Pipe SizeOD (A)ID (B)WALL (C)
1/20.840.5460.147
3/41.050.7420.154
11.3150.9570.179
1-1/41.661.2780.191
1-1/21.91.50.2
22.3751.9390.218
2-1/22.8752.3230.276
33.52.90.3
3-1/243.3640.318
44.53.8260.337
55.5634.8130.375
66.6255.7610.432
88.6257.6250.5
1010.759.750.5
1212.7511.750.5
1414130.5
1616150.5
1818170.5
2020190.5
2424230.5
3030290.5
3636350.5
4242410.5
4848470.5
Pipe Sizelb/ftgal/ft—
431020.6260.012—
431630.8480.022—
11.250.037—
379871.7240.067—
372572.0890.092—
22.890.153—
372884.4080.22—
35.8990.343—
373167.1950.462—
48.6210.597—
511.9550.945—
616.441.354—
824.9642.372—
1031.4933.879—
1237.6385.633—
1441.4786.895—
1647.6239.18—
1853.76811.791—
2059.91314.729—
2472.20321.583—
3090.63834.313—
36109.07349.98—
42127.50868.585—
48145.94390.127—

Titanium Pipe sch 40

Pipe SizeOD (A)ID (B)WALL (C)
1/20.840.6220.109
3/41.050.8240.113
11.3151.0490.133
1-1/41.661.380.14
1-1/21.91.610.145
22.3752.0670.154
2-1/22.8752.4690.203
33.53.0680.216
3-1/243.5480.226
44.54.0260.237
55.5635.0470.258
66.6256.0650.28
88.6257.9810.322
1010.7510.020.365
1212.75120.375
141413.250.375
161615.250.375
181817.250.375
202019.250.375
242423.250.375
303029.250.375
363635.250.375
424241.250.375
484847.250.375
Pipe Sizelb/ftgal/ft—
1/20.490.016—
3/40.6510.028—
10.9660.045—
1-1/41.3080.078—
1-1/21.5640.106—
22.1020.174—
2-1/23.3330.249—
34.3590.384—
3-1/25.2410.514—
46.2080.661—
58.4111.039—
610.9171.501—
816.4292.599—
1023.294.096—
1228.525.875—
1431.47.163—
1636.019.489—
1840.6112.141—
2045.2215.119—
2454.4422.055—
3068.2734.907—
3682.0950.696—
4295.9269.424—
48109.7591.088—

Vitrified Clay Pipe Chart

Pipe Size (B)OD (A)WALL (C)BELL (D)
45.31250.68756.5
67.877.879.05
810.020.9811.49
1012.471.114.07
1214.521.2615.96
1518.31.7120.3
1821.872.0323.9
2125.782.3627.78
2428.852.4730.78
2732.772.9934.92
3036.063.1338.26
3339.523.2341.74
3643.013.6845.77
3946.423.6649.66
4250.174.0653.18
Pipe Size (B)LENGTHWt Linear Ftgal/ft
41′, 2′, 4′110.653
61′, 2′, 6′211.469
81′, 2′, 6′302.611
101′, 2′, 6′444.08
121′, 2′, 6′545.875
151′, 2′, 6′909.18
181′, 2′, 6′14113.219
211′, 2′, 6′16817.993
241′, 2′, 6′23023.501
271′, 2′, 6′29029.743
301′, 2′, 6′33336.72
331′, 2′, 6′41544.431
361′, 2′, 6′44552.877
391′, 2′, 5.5′54062.057
421′, 2′, 5.5′60371.971
Pipe Size (B)BELL OD €BELL LENGTH (G)BELL WALL (F)
47.6251.50.5
610.432.330.67
813.092.310.78
1015.872.610.92
1218.512.840.99
1522.962.811.28
1824.473.221.5
2130.783.731.6
2434.063.671.71
2738.263.971.76
3042.183.92.02
3346.434.142.27
3649.934.052.27
3954.834.12.49
4258.54.672.55

Tab sample

Click on the buttons inside the tabbed menu:

London

London is the capital city of England.

Paris

Paris is the capital of France.

Tokyo

Tokyo is the capital of Japan.

ISO Metric Fine Thread V

Compared to standard threads, a fine thread has a smaller pitch which increases the resilience. It is used e.g. for adjusting screws in measuring instruments because it allows for finer settings. The term consists of the letter M, the nominal diameter and the pitch, the flank angle is 60°.

Specifications of International Thread Standards
Nom. Dia. (mm)Pitch (mm)Tap Drill (mm)
M 12.01.5010.38
M 13.01.5011.38
M 14.01.5012.38
M 15.01.5013.38
M 16.01.5014.38
M 17.01.5015.38
M 18.01.5016.38
M 19.01.5017.38
M 20.01.5018.38
M 21.01.5019.38
M 22.01.5020.38
M 23.01.5021.38
M 24.01.5022.38
M 25.01.5023.38
M 26.01.5024.38
M 27.01.5025.38
M 28.01.5026.38
M 29.01.5027.38
M 30.01.5028.38
M 31.01.5029.38
M 32.01.5030.38
M 33.01.5031.38
M 34.01.5032.38
M 35.01.5033.38
M 36.01.5034.38
M 37.01.5035.38
M 38.01.5036.38
M 39.01.5037.38
M 40.01.5038.38
M 42.01.5040.38
M 45.01.5043.38
M 48.01.5046.38
M 50.01.5048.38
M 52.01.5050.38
M 55.01.5053.38
M 56.01.5054.38
M 58.01.5056.38
M 60.01.5058.38
M 62.01.5060.38
M 64.01.5062.38
M 65.01.5063.38
M 68.01.5066.38
M 70.01.5068.38
M 72.01.5070.38
M 75.01.5073.38
M 76.01.5074.38
M 78.01.5076.38
M 80.01.5078.38
M 82.01.5080.38
M 85.01.5083.38
M 88.01.5086.38
M 90.01.5088.38
M 92.01.5090.38
M 95.01.5093.38
M 98.01.5096.38
M 100.01.5098.38
M 102.01.50100.38
M 105.01.50103.38
M 108.01.50106.38
M 110.01.50108.38
M 112.01.50110.38
M 115.01.50113.38
M 118.01.50116.38
M 120.01.50118.38
M 122.01.50120.38
M 125.01.50123.38
M 128.01.50126.38
M 130.01.50128.38
M 132.01.50130.38
M 135.01.50133.38
M 138.01.50136.38
M 140.01.50138.38
M 142.01.50140.38
M 145.01.50143.38
M 148.01.50146.38
M 150.01.50148.38
M 152.01.50150.38
M 155.01.50153.38
M 158.01.50156.38
M 160.01.50158.38
M 162.01.50160.38
M 165.01.50163.38
M 168.01.50166.38
M 170.01.50168.38
M 172.01.50170.38
M 175.01.50173.38
M 178.01.50176.38
M 180.01.50178.38
M 182.01.50180.38
M 185.01.50183.38
M 188.01.50186.38
M 190.01.50188.38
M 192.01.50190.38
M 195.01.50193.38
M 198.01.50196.38
M 200.01.50198.38
M 202.01.50200.38
M 205.01.50203.38
M 208.01.50206.38
M 210.01.50208.38
M 212.01.50210.38
M 215.01.50213.38
M 218.01.50216.38
M 220.01.50218.38
M 222.01.50220.38
M 225.01.50223.38
M 228.01.50226.38
M 230.01.50228.38
M 232.01.50230.38
M 235.01.50233.38
M 238.01.50236.38
M 240.01.50238.38
M 242.01.50240.38
M 245.01.50243.38
M 248.01.50246.38
M 250.01.50248.38
M 252.01.50250.38
M 255.01.50253.38
M 258.01.50256.38
M 260.01.50258.38
M 262.01.50260.38
M 265.01.50263.38
M 268.01.50266.38
M 270.01.50268.38
M 272.01.50270.38
M 275.01.50273.38
M 278.01.50276.38
M 280.01.50278.38
M 282.01.50280.38
M 285.01.50283.38
M 288.01.50286.38
M 290.01.50288.38
M 292.01.50290.38
M 295.01.50293.38
M 298.01.50296.38
M 300.01.50298.38″}

See Other ISO threads

UNF – Unified National Fine 60°

Nominal
Diameter
Major
Diameter
Inch
Major
Diameter
mm
Tapping
Drill Size
mm
TPI Pitch
mm
#0 - 80 UNF 0.060 1.524 1.25 80 0.317
#1 - 72 UNF 0.073 1.854 1.55 72 0.353
#2 - 64 UNF 0.086 2.184 1.90 64 0.397
#3 - 56 UNF 0.099 2.515 2.15 56 0.453
#4 - 48 UNF 0.112 2.845 2.40 48 0.529
#5 - 44 UNF 0.125 3.175 2.70 44 0.577
#6 - 40 UNF 0.138 3.505 2.95 40 0.635
#8 - 36 UNF 0.164 4.166 3.50 36 0.705
#10 - 32 UNF 0.190 4.826 4.10 32 0.794
#12 - 28 UNF 0.216 5.486 4.70 28 0.907
1/4" - 28 UNF 0.250 6.350 5.50 28 0.907
5/16" - 24 UNF 0.313 7.938 6.90 24 1.058
3/8" - 24 UNF 0.375 9.525 8.50 24 1.058
7/16" - 20 UNF 0.438 11.112 9.90 20 1.270
1/2" - 20 UNF 0.500 12.700 11.50 20 1.270
9/16" - 18 UNF 0.563 14.288 12.90 18 1.411
5/8" - 18 UNF 0.625 15.875 14.50 18 1.411
3/4" - 16 UNF 0.750 19.050 17.50 16 1.587
7/8" - 14 UNF 0.875 22.225 20.40 14 1.814
1" - 12 UNF 1.000 25.400 23.25 12 2.117
1 1/8" - 12 UNF 1.125 28.575 26.50 12 2.117
1 1/4" - 12 UNF 1.250 31.750 29.50 12 2.117
1 3/8" - 12 UNF 1.375 34.925 32.75 12 2.117
1 1/2" - 12 UNF 1.500 38.100 36.00 12 2.117
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