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Fitting Size Charts

American Connections

National Pipe Tapered Fuel (NPTF)

Inch sizeDash sizeThreads per InchMale Thread O.D. (in)Female thread O.D (in)
18-22713320.41380.38
14-41817320.54120.49
38-61811160.68580.63
12-81427320.8425320.77
34-121411161.0510.98
1-16111215161.321141.24
114-201112121321.66119321.58
112-241112129321.90113⁄161.82
2-3211122382.3825162.30

National Pipe straight mechanical (NPSM)

Inch sizeDash sizeThreads per InchMale Thread O.D. (in)Female thread O.D (in)
18-22713320.41380.38
14-41817320.54120.49
38-61411160.68580.63
12-81427320.8425320.77
34-121411161.0510.98
1-16111215161.321141.24
114-201112121321.66119321.58
112-241112129321.90113⁄161.82
2-3211122382.3825162.30

JIC 37° Flare (SAE J514)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-2516 – 245160.319320.27
316-338 – 24380.3811320.34
14-4716 – 207160.4413320.39
516-512 – 20120.5015320.45
38-6916 – 189160.5617320.51
12-834 – 16340.7511160.69
58-1078 – 14780.8813160.81
34-121116 – 1211161.0610.98
78-141316 – 1213161.191181.10
1-161516-1215161.311141.23
114-20158 – 121581.6319161.54
112-24178 – 121781.88113161.79
2-32212 – 122122.5027162.42

SAE 45° Flare (SAE J512)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-2516 – 245160.319320.27
316-338 – 24380.3811320.34
14-4716 – 207160.4413320.39
516-512 – 20120.5015320.45
38-658 – 18580.639160.57
12-834 – 16340.7511160.69
58-1078 – 14780.8813160.81
34-121116 – 1411161.0610.99
78-14114 – 121141.2515321.16
1-16138 – 121381.3819321.29

SAE Straight Thread O-ring (O-Ring Boss)

SAE J1926-1 and ISO 11296-1
Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-2516 – 245160.319320.27
316-338 – 24380.3811320.34
14-4716 – 207160.4413320.39
516-512 – 20120.5015320.45
38-6916 – 189160.5617320.51
12-834 – 16340.7511160.69
58-1078 – 14780.8813160.81
34-121116 – 121 1161.0610.98
78-141316 – 1213161.191181.10
1-161516 – 1215161.311141.23
114-20158 – 121581.6319161.54
112-24178 – 121781.88113161.79
2-32212 – 122122.5027162.42

Flareless Compression (SAE J514)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-2516 – 245160.319320.27
316-338 – 24380.3811320.34
14-4716 – 207160.4413320.39
516-512 – 20120.5015320.45
38-6916 – 189160.5617320.51
12-834 – 16340.7511160.69
58-1078 – 14780.8813160.81
34-121116 – 1211161.0610.98
78-141316 – 1213161.191181.10
1-161516 – 1215161.311141.23
114-20158 – 121581.6319161.54
112-24178 – 121781.88113161.79
2-32212 – 122122.5027162.42

O-Ring Face Seal (SAE J1453)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
14-4916 – 189160.5617320.51
38-61116 – 1611160.69580.63
12-81316 – 1613160.82340.75
58-101 – 1411.0015160.93
34-121316 – 1213161.191181.11
1-161716 – 1217161.441341.36
114-2011116 – 12111161.691581.61
112-242-1222.00115161.92

SAE Inverted Flare (SAE J512)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-2516 – 285160.319320.27
316-338 – 24380.3811320.34
14-4716 – 247160.4413320.39
516-512 – 20120.5015320.45
38-658 – 18580.639160.57
716-71116 – 1811160.69580.63
12-834 – 18340.7523320.70
58-1078 – 18780.8813160.81
34-121116 – 1611161.0611.00

Four-Bolt Flange (SAE J518 and ISO 6162)

Inch sizeDash sizeCode 61 Bolt SpacingCode 61 Flange O.D.Code 62 Bolt SpacingCode 62 Flange O.D.
12-8112131611932114
34-121781122158
1-162116134214178
114-2025162258218
112-24234238318212
2-3231162133231316318
212-403123516n/an/a
3-4843164n/an/a

O-Ring Pilot Threads

Inch sizeDash sizeMale ThreadFemale thread
Thread sizeThread O.D.Thread sizeThread I.D.
38-658 – 185858 – 18916
12-834 – 183434 – 161116
58-1078 – 187878 – 141316
34-121116 – 1611161116 – 141
Inch sizeDash sizeLong pilotShort pilot
Bead O.D. (in)Pilot Length (in)Bead O.D. (in)Pilot Length (in)
38-60.520.280.520.19
12-80.640.390.640.19
58-100.770.390.770.19
34-120.910.390.910.19

International Connections

British Standard Pipe Parallel (BSPP)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-218 – 28380.3811320.35
14-414 – 1933640.5215320.47
38-638 – 1921320.6519320.60
12-812 – 1413160.82340.75
58-1058 – 14780.8813160.80
34-1234 – 1411321.0431320.97
1-161 – 1115161.3017321.22
114-20114 – 11121321.6519161.56
112-24112 – 111781.88125321.79
2-322 – 11211322.352142.26

British Standard Pipe Tapered (BSPT)

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-218 – 28380.3811320.35
14-414 – 1933640.5215320.47
38-638 – 1921320.6519320.60
12-812 – 1413160.82340.75
58-1058 – 14780.8813160.80
34-1234 – 1411321.0431320.97
1-161 – 1115161.3017321.22
114-20114 – 11121321.6519161.56
112-24112 – 111781.88125321.79
2-322 – 11211322.352142.26

Flat Face Port with Metric Threads (ISO 9974-1)

Metric Thread SizeMale Thread O.D. (mm)Female Thread I.D (mm)
M8 x 1.087
M10 x 1.0109
M12 x 1.51210.5
M14 x 1.51412.5
M16 x 1.51614.5
M18 x 1.51816.5
M20 x 1.52018.5
M22 x 1.52220.5
M24 x 1.52422.5
M26 x 1.52624.5
M27 x 2.02725
M33 x 2.03331
M36 x 2.03634
M42 x 2.04240
M45 x 2.04543
M48 x 2.04846

ISO 6149 Metric Port and Stud Ends

ISO 261 threads & O-ring seal
Metric Thread SizeMale Thread O.D. (mm)Female Thread I.D (mm)
M8 x 1.087
M10 x 1.0109
M12 x 1.51210.5
M14 x 1.51412.5
M16 x 1.51614.5
M18 x 1.51816.5
M22 x 1.52220.5
M27 x 2.02725
M33 x 2.03331
M42 x 2.04240
M48 x 2.04846
M60 x 2.06058

Metric 60° Cone

DIN 7631
Pipe/Tube O.D. (mm)Metric Thread SizeMale Thread O.D. (mm)Female Thread I.D (mm)
6M12 x 1.51210.5
8M14 x 1.51412.5
10M16 x 1.51614.5
12M18 x 1.51816.5
15M22 x 1.52220.5
18M26 x 1.52624.5
22M30 x 1.53028.5
28M38 x 1.53836.5
35M45 x 1.54543.5
52M52 x 1.55250.5

Metric Tube Compression (DIN 2353 24° Cone)

DIN 2353 L Tube O.D.(mm)DIN 2353 S Tube O.D. (mm)Metric Thread SizeMale Thread O.D. (mm)Female Thread I.D (mm)
6M12 x 1.51210.5
86M14 x 1.51412.5
108M16 x 1.51614.5
1210M18 x 1.51816.5
12M20 x 1.52018.5
1514M22 x 1.52220.5
16M24 x 1.52422.5
18M26 x 1.52624.5
2220M30 x 2.03028
2825M36 x 2.03634
30M42 x 2.04240
35M45 x 2.04543
4238M52 x 2.05250

Japanese Industrial Standard JIS 300 Flare

Inch sizeDash sizeThread SizeMale Thread O.D. (in)Female thread O.D (in)
18-218 – 28380.3811320.35
14-414 – 1933640.5215320.47
38-638 – 1921320.6519320.60
12-812 – 1413160.82340.75
58-1058 – 14780.8813160.80
34-1234 – 1411321.0431320.97
1-161 – 1115161.3017321.22
114-20114 – 11121321.6519161.56
112-24112 – 111781.88125321.79
2-322 – 11211322.352142.26

Komatsu 30° Flare (JIS Metric)

Dash SizeMetric Thread SizeMale Thread O.D. (mm)Female Thread I.D (mm)
-6M18 x 1.51816.5
-8M22 x 1.52220.5
-10M24 x 1.52422.5
-12M30 x 1.53028.5
-16M33 x 1.53331.5
-20M36 x 1.53634.5
-24M42 x 1.54240.5