SAE J514, 37° Flare (JIC)
Commonly referred to as 37° JIC, this connection is widely used in hydraulic systems. When the straight threads are engaged, the 37° male seat seals on the 37° female flare seat. Most thread sizes are identical to the 45° SAE connection as noted (*) below. Care must be taken not to confuse these two connectors, which have different seat angles.
Click
here for a guide on how to properly measure threads.
Click
here for a printable, actual size 37° flare fitting profiles. You will need to have Adobe Reader to view and print the file.
| SAE J514, 37° JIC Flare |
Dash
Size |
Inch
Size |
Thread |
Male
Thread
O.D.
mm |
Male
Thread
O.D.
inches |
Female
Thread
I.D.
mm |
Female
Thread
I.D.
inches |
| 2 |
1/8 |
5/16-24* |
7.9 |
.31 |
6.9 |
.27 |
| 3 |
3/16 |
3/8-24* |
9.6 |
.38 |
8.6 |
.34 |
| 4 |
1/4 |
7/16-20* |
11.2 |
.44 |
9.9 |
.39 |
| 5 |
5/16 |
1/2-20* |
12.7 |
.50 |
11.4 |
.45 |
| 6 |
3/8 |
9/16-18 |
14.2 |
.56 |
12.9 |
.51 |
| 8 |
1/2 |
3/4-16* |
19.0 |
.75 |
17.0 |
.67 |
| 10 |
5/8 |
7/8-14* |
22.3 |
.88 |
20.3 |
.80 |
| 12 |
3/4 |
1 1/16-12 |
26.9 |
1.06 |
24.9 |
.98 |
| 14 |
7/8 |
1 3/16-12 |
30.0 |
1.18 |
27.7 |
1.09 |
| 16 |
1 |
1 5/16-12 |
33.3 |
1.31 |
31.0 |
1.22 |
| 20 |
1 1/4 |
1 5/8-12 |
41.4 |
1.63 |
39.1 |
1.54 |
| 24 |
1 1/2 |
1 7/8-12 |
47.7 |
1.88 |
45.5 |
1.79 |
| 32 |
2 |
2 ½-12 |
63.5 |
2.50 |
61.2 |
2.41 |
|
