We value your privacy

We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our traffic. By clicking "Accept All", you consent to our use of cookies.

Customize Consent Preferences

We use cookies to help you navigate efficiently and perform certain functions. You will find detailed information about all cookies under each consent category below.

The cookies that are categorized as "Necessary" are stored on your browser as they are essential for enabling the basic functionalities of the site. ... 

Always Active

Necessary cookies are required to enable the basic features of this site, such as providing secure log-in or adjusting your consent preferences. These cookies do not store any personally identifiable data.

No cookies to display.

Functional cookies help perform certain functionalities like sharing the content of the website on social media platforms, collecting feedback, and other third-party features.

No cookies to display.

Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics such as the number of visitors, bounce rate, traffic source, etc.

No cookies to display.

Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.

No cookies to display.

Advertisement cookies are used to provide visitors with customized advertisements based on the pages you visited previously and to analyze the effectiveness of the ad campaigns.

No cookies to display.

global precision parts logo

ISO 9001:2015             ITAR Registered                SAM Registered

419-233-1399

Menu

Fitting Size Charts

American Connections

National Pipe Tapered Fuel (NPTF)

Inch size Dash size Threads per Inch Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 27 13⁄32 0.41 3⁄8 0.38
1⁄4 -4 18 17⁄32 0.54 1⁄2 0.49
3⁄8 -6 18 11⁄16 0.68 5⁄8 0.63
1⁄2 -8 14 27⁄32 0.84 25⁄32 0.77
3⁄4 -12 14 1 1⁄16 1.05 1 0.98
1 -16 11 1⁄2 1 5⁄16 1.32 1 1⁄4 1.24
1 1⁄4 -20 11 1⁄2 1 21⁄32 1.66 1 19⁄32 1.58
1 1⁄2 -24 11 1⁄2 1 29⁄32 1.90 1 13⁄16 1.82
2 -32 11 1⁄2 2 3⁄8 2.38 2 5⁄16 2.30

National Pipe straight mechanical (NPSM)

Inch size Dash size Threads per Inch Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 27 13⁄32 0.41 3⁄8 0.38
1⁄4 -4 18 17⁄32 0.54 1⁄2 0.49
3⁄8 -6 14 11⁄16 0.68 5⁄8 0.63
1⁄2 -8 14 27⁄32 0.84 25⁄32 0.77
3⁄4 -12 14 1 1⁄16 1.05 1 0.98
1 -16 11 1⁄2 1 5⁄16 1.32 1 1⁄4 1.24
1 1⁄4 -20 11 1⁄2 1 21⁄32 1.66 1 19⁄32 1.58
1 1⁄2 -24 11 1⁄2 1 29⁄32 1.90 1 13⁄16 1.82
2 -32 11 1⁄2 2 3⁄8 2.38 2 5⁄16 2.30

JIC 37° Flare (SAE J514)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 5⁄16 – 24 5⁄16 0.31 9⁄32 0.27
3⁄16 -3 3⁄8 – 24 3⁄8 0.38 11⁄32 0.34
1⁄4 -4 7⁄16 – 20 7⁄16 0.44 13⁄32 0.39
5⁄16 -5 1⁄2 – 20 1⁄2 0.50 15⁄32 0.45
3⁄8 -6 9⁄16 – 18 9⁄16 0.56 17⁄32 0.51
1⁄2 -8 3⁄4 – 16 3⁄4 0.75 11⁄16 0.69
5⁄8 -10 7⁄8 – 14 7⁄8 0.88 13⁄16 0.81
3⁄4 -12 1 1⁄16 – 12 11⁄16 1.06 1 0.98
7⁄8 -14 1 3⁄16 – 12 1 3⁄16 1.19 1 1⁄8 1.10
1 -16 1 5⁄16-12 1 5⁄16 1.31 1 1⁄4 1.23
1 1⁄4 -20 1 5⁄8 – 12 1 5⁄8 1.63 1 9⁄16 1.54
1 1⁄2 -24 1 7⁄8 – 12 1 7⁄8 1.88 1 13⁄16 1.79
2 -32 2 1⁄2 – 12 2 1⁄2 2.50 2 7⁄16 2.42

SAE 45° Flare (SAE J512)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 5⁄16 – 24 5⁄16 0.31 9⁄32 0.27
3⁄16 -3 3⁄8 – 24 3⁄8 0.38 11⁄32 0.34
1⁄4 -4 7⁄16 – 20 7⁄16 0.44 13⁄32 0.39
5⁄16 -5 1⁄2 – 20 1⁄2 0.50 15⁄32 0.45
3⁄8 -6 5⁄8 – 18 5⁄8 0.63 9⁄16 0.57
1⁄2 -8 3⁄4 – 16 3⁄4 0.75 11⁄16 0.69
5⁄8 -10 7⁄8 – 14 7⁄8 0.88 13⁄16 0.81
3⁄4 -12 1 1⁄16 – 14 11⁄16 1.06 1 0.99
7⁄8 -14 1 1⁄4 – 12 1 1⁄4 1.25 1 5⁄32 1.16
1 -16 1 3⁄8 – 12 1 3⁄8 1.38 1 9⁄32 1.29

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

SAE J1926-1 and ISO 11296-1
Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 5⁄16 – 24 5⁄16 0.31 9⁄32 0.27
3⁄16 -3 3⁄8 – 24 3⁄8 0.38 11⁄32 0.34
1⁄4 -4 7⁄16 – 20 7⁄16 0.44 13⁄32 0.39
5⁄16 -5 1⁄2 – 20 1⁄2 0.50 15⁄32 0.45
3⁄8 -6 9⁄16 – 18 9⁄16 0.56 17⁄32 0.51
1⁄2 -8 3⁄4 – 16 3⁄4 0.75 11⁄16 0.69
5⁄8 -10 7⁄8 – 14 7⁄8 0.88 13⁄16 0.81
3⁄4 -12 1 1⁄16 – 12 1 1⁄16 1.06 1 0.98
7⁄8 -14 1 3⁄16 – 12 1 3⁄16 1.19 1 1⁄8 1.10
1 -16 1 5⁄16 – 12 1 5⁄16 1.31 1 1⁄4 1.23
1 1⁄4 -20 1 5⁄8 – 12 1 5⁄8 1.63 1 9⁄16 1.54
1 1⁄2 -24 1 7⁄8 – 12 1 7⁄8 1.88 1 13⁄16 1.79
2 -32 2 1⁄2 – 12 2 1⁄2 2.50 2 7⁄16 2.42

Flareless Compression (SAE J514)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 5⁄16 – 24 5⁄16 0.31 9⁄32 0.27
3⁄16 -3 3⁄8 – 24 3⁄8 0.38 11⁄32 0.34
1⁄4 -4 7⁄16 – 20 7⁄16 0.44 13⁄32 0.39
5⁄16 -5 1⁄2 – 20 1⁄2 0.50 15⁄32 0.45
3⁄8 -6 9⁄16 – 18 9⁄16 0.56 17⁄32 0.51
1⁄2 -8 3⁄4 – 16 3⁄4 0.75 11⁄16 0.69
5⁄8 -10 7⁄8 – 14 7⁄8 0.88 13⁄16 0.81
3⁄4 -12 1 1⁄16 – 12 11⁄16 1.06 1 0.98
7⁄8 -14 1 3⁄16 – 12 1 3⁄16 1.19 1 1⁄8 1.10
1 -16 1 5⁄16 – 12 1 5⁄16 1.31 1 1⁄4 1.23
1 1⁄4 -20 1 5⁄8 – 12 1 5⁄8 1.63 1 9⁄16 1.54
1 1⁄2 -24 1 7⁄8 – 12 1 7⁄8 1.88 1 13⁄16 1.79
2 -32 2 1⁄2 – 12 2 1⁄2 2.50 2 7⁄16 2.42

O-Ring Face Seal (SAE J1453)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄4 -4 9⁄16 – 18 9⁄16 0.56 17⁄32 0.51
3⁄8 -6 11⁄16 – 16 11⁄16 0.69 5⁄8 0.63
1⁄2 -8 13⁄16 – 16 13⁄16 0.82 3⁄4 0.75
5⁄8 -10 1 – 14 1 1.00 15⁄16 0.93
3⁄4 -12 1 3⁄16 – 12 13⁄16 1.19 1 1⁄8 1.11
1 -16 1 7⁄16 – 12 1 7⁄16 1.44 1 3⁄4 1.36
1 1⁄4 -20 1 11⁄16 – 12 1 11⁄16 1.69 1 5⁄8 1.61
1 1⁄2 -24 2-12 2 2.00 1 15⁄16 1.92

SAE Inverted Flare (SAE J512)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 5⁄16 – 28 5⁄16 0.31 9⁄32 0.27
3⁄16 -3 3⁄8 – 24 3⁄8 0.38 11⁄32 0.34
1⁄4 -4 7⁄16 – 24 7⁄16 0.44 13⁄32 0.39
5⁄16 -5 1⁄2 – 20 1⁄2 0.50 15⁄32 0.45
3⁄8 -6 5⁄8 – 18 5⁄8 0.63 9⁄16 0.57
7⁄16 -7 11⁄16 – 18 11⁄16 0.69 5⁄8 0.63
1⁄2 -8 3⁄4 – 18 3⁄4 0.75 23⁄32 0.70
5⁄8 -10 7⁄8 – 18 7⁄8 0.88 13⁄16 0.81
3⁄4 -12 1 1⁄16 – 16 1 1⁄16 1.06 1 1.00

Four-Bolt Flange (SAE J518 and ISO 6162)

Inch size Dash size Code 61 Bolt Spacing Code 61 Flange O.D. Code 62 Bolt Spacing Code 62 Flange O.D.
1⁄2 -8 1 1⁄2 1 3⁄16 1 19⁄32 1 1⁄4
3⁄4 -12 1 7⁄8 1 1⁄2 2 1 5⁄8
1 -16 2 1⁄16 1 3⁄4 2 1⁄4 1 7⁄8
1 1⁄4 -20 2 5⁄16 2 2 5⁄8 2 1⁄8
1 1⁄2 -24 2 3⁄4 2 3⁄8 3 1⁄8 2 1⁄2
2 -32 3 1⁄16 2 13⁄32 3 13⁄16 3 1⁄8
2 1⁄2 -40 3 1⁄2 3 5⁄16 n/a n/a
3 -48 4 3⁄16 4 n/a n/a

O-Ring Pilot Threads

Inch size Dash size Male Thread Female thread
Thread size Thread O.D. Thread size Thread I.D.
3⁄8 -6 5⁄8 – 18 5⁄8 5⁄8 – 18 9⁄16
1⁄2 -8 3⁄4 – 18 3⁄4 3⁄4 – 16 11⁄16
5⁄8 -10 7⁄8 – 18 7⁄8 7⁄8 – 14 13⁄16
3⁄4 -12 1 1⁄16 – 16 1 1⁄16 1 1⁄16 – 14 1
Inch size Dash size Long pilot Short pilot
Bead O.D. (in) Pilot Length (in) Bead O.D. (in) Pilot Length (in)
3⁄8 -6 0.52 0.28 0.52 0.19
1⁄2 -8 0.64 0.39 0.64 0.19
5⁄8 -10 0.77 0.39 0.77 0.19
3⁄4 -12 0.91 0.39 0.91 0.19

International Connections

British Standard Pipe Parallel (BSPP)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 1⁄8 – 28 3⁄8 0.38 11⁄32 0.35
1⁄4 -4 1⁄4 – 19 33⁄64 0.52 15⁄32 0.47
3⁄8 -6 3⁄8 – 19 21⁄32 0.65 19⁄32 0.60
1⁄2 -8 1⁄2 – 14 13⁄16 0.82 3⁄4 0.75
5⁄8 -10 5⁄8 – 14 7⁄8 0.88 13⁄16 0.80
3⁄4 -12 3⁄4 – 14 1 1⁄32 1.04 31⁄32 0.97
1 -16 1 – 11 1 5⁄16 1.30 1 7⁄32 1.22
1 1⁄4 -20 1 1⁄4 – 11 1 21⁄32 1.65 1 9⁄16 1.56
1 1⁄2 -24 1 1⁄2 – 11 1 7⁄8 1.88 1 25⁄32 1.79
2 -32 2 – 11 2 11⁄32 2.35 2 1⁄4 2.26

British Standard Pipe Tapered (BSPT)

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 1⁄8 – 28 3⁄8 0.38 11⁄32 0.35
1⁄4 -4 1⁄4 – 19 33⁄64 0.52 15⁄32 0.47
3⁄8 -6 3⁄8 – 19 21⁄32 0.65 19⁄32 0.60
1⁄2 -8 1⁄2 – 14 13⁄16 0.82 3⁄4 0.75
5⁄8 -10 5⁄8 – 14 7⁄8 0.88 13⁄16 0.80
3⁄4 -12 3⁄4 – 14 1 1⁄32 1.04 31⁄32 0.97
1 -16 1 – 11 1 5⁄16 1.30 1 7⁄32 1.22
1 1⁄4 -20 1 1⁄4 – 11 1 21⁄32 1.65 1 9⁄16 1.56
1 1⁄2 -24 1 1⁄2 – 11 1 7⁄8 1.88 1 25⁄32 1.79
2 -32 2 – 11 2 11⁄32 2.35 2 1⁄4 2.26

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

Metric Thread Size Male Thread O.D. (mm) Female Thread I.D (mm)
M8 x 1.0 8 7
M10 x 1.0 10 9
M12 x 1.5 12 10.5
M14 x 1.5 14 12.5
M16 x 1.5 16 14.5
M18 x 1.5 18 16.5
M20 x 1.5 20 18.5
M22 x 1.5 22 20.5
M24 x 1.5 24 22.5
M26 x 1.5 26 24.5
M27 x 2.0 27 25
M33 x 2.0 33 31
M36 x 2.0 36 34
M42 x 2.0 42 40
M45 x 2.0 45 43
M48 x 2.0 48 46

ISO 6149 Metric Port and Stud Ends

ISO 261 threads & O-ring seal
Metric Thread Size Male Thread O.D. (mm) Female Thread I.D (mm)
M8 x 1.0 8 7
M10 x 1.0 10 9
M12 x 1.5 12 10.5
M14 x 1.5 14 12.5
M16 x 1.5 16 14.5
M18 x 1.5 18 16.5
M22 x 1.5 22 20.5
M27 x 2.0 27 25
M33 x 2.0 33 31
M42 x 2.0 42 40
M48 x 2.0 48 46
M60 x 2.0 60 58

Metric 60° Cone

DIN 7631
Pipe/Tube O.D. (mm) Metric Thread Size Male Thread O.D. (mm) Female Thread I.D (mm)
6 M12 x 1.5 12 10.5
8 M14 x 1.5 14 12.5
10 M16 x 1.5 16 14.5
12 M18 x 1.5 18 16.5
15 M22 x 1.5 22 20.5
18 M26 x 1.5 26 24.5
22 M30 x 1.5 30 28.5
28 M38 x 1.5 38 36.5
35 M45 x 1.5 45 43.5
52 M52 x 1.5 52 50.5

Metric Tube Compression (DIN 2353 24° Cone)

DIN 2353 L Tube O.D.(mm) DIN 2353 S Tube O.D. (mm) Metric Thread Size Male Thread O.D. (mm) Female Thread I.D (mm)
6 M12 x 1.5 12 10.5
8 6 M14 x 1.5 14 12.5
10 8 M16 x 1.5 16 14.5
12 10 M18 x 1.5 18 16.5
12 M20 x 1.5 20 18.5
15 14 M22 x 1.5 22 20.5
16 M24 x 1.5 24 22.5
18 M26 x 1.5 26 24.5
22 20 M30 x 2.0 30 28
28 25 M36 x 2.0 36 34
30 M42 x 2.0 42 40
35 M45 x 2.0 45 43
42 38 M52 x 2.0 52 50

Japanese Industrial Standard JIS 300 Flare

Inch size Dash size Thread Size Male Thread O.D. (in) Female thread O.D (in)
1⁄8 -2 1⁄8 – 28 3⁄8 0.38 11⁄32 0.35
1⁄4 -4 1⁄4 – 19 33⁄64 0.52 15⁄32 0.47
3⁄8 -6 3⁄8 – 19 21⁄32 0.65 19⁄32 0.60
1⁄2 -8 1⁄2 – 14 13⁄16 0.82 3⁄4 0.75
5⁄8 -10 5⁄8 – 14 7⁄8 0.88 13⁄16 0.80
3⁄4 -12 3⁄4 – 14 1 1⁄32 1.04 31⁄32 0.97
1 -16 1 – 11 1 5⁄16 1.30 1 7⁄32 1.22
1 1⁄4 -20 1 1⁄4 – 11 1 21⁄32 1.65 1 9⁄16 1.56
1 1⁄2 -24 1 1⁄2 – 11 1 7⁄8 1.88 1 25⁄32 1.79
2 -32 2 – 11 2 11⁄32 2.35 2 1⁄4 2.26

Komatsu 30° Flare (JIS Metric)

Dash Size Metric Thread Size Male Thread O.D. (mm) Female Thread I.D (mm)
-6 M18 x 1.5 18 16.5
-8 M22 x 1.5 22 20.5
-10 M24 x 1.5 24 22.5
-12 M30 x 1.5 30 28.5
-16 M33 x 1.5 33 31.5
-20 M36 x 1.5 36 34.5
-24 M42 x 1.5 42 40.5