

O-Ring Boss
O-Ring Boss
The O-ring boss male will mate with an O-ring boss female
only. The female is generally found on ports.
The male has straight threads and an O-ring. The female has
straight threads and a sealing face. The seal is made at the
O-ring on the male and the sealing face on the female.
SAE Straight Thread O-Ring Boss

Dash Size |
Nominal Size (In.) |
No. Threads Per Inch |
Male Thread O.D. (In.) |
Female Thread I.D. (In.) |
O-Ring Size |
| -2 |
1/8 |
5/16 -24 |
5/16 |
17/64 |
- |
| -3 |
3/16 |
3/8 -24 |
3/8 |
21/64 |
7254-0003 |
| -4 |
1/4 |
7/16 -20 |
7/16 |
25/64 |
7254-0004 |
| -5 |
5/16 |
1/2 -20 |
1/2 |
29/64 |
7254-0005 |
| -6 |
3/8 |
9/16 -18 |
9/16 |
1/2 |
7254-0006 |
| -8 |
1/2 |
3/4 -16 |
3/4 |
11/16 |
7254-0008 |
| -10 |
5/8 |
7/8 -14 |
7/8 |
13/16 |
7254-0010 |
| -12 |
3/4 |
1 1/16 -12 |
1 1/16 |
31/32 |
7254-0012 |
| -14 |
7/8 |
1 3/16 -12 |
1 3/16 |
1 7/64 |
7254-0014 |
| -16 |
1 |
1 5/16 -12 |
1 5/16 |
1 15/64 |
7254-0016 |
| -20 |
1 1/4 |
1 5/8 -12 |
1 5/8 |
1 35/64 |
7254-0020 |
| -24 |
1 1/2 |
1 7/8 -12 |
1 7/8 |
1 51/64 |
- |
| -32 |
2 |
2 1/2-12 |
2 1/2 |
2 27/64 |
- |
|
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