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SAE J512, 45 Flare

SAE J512, 45 Flare

The SAE 45 flare connectors seal in the same manner and are similar to the 37 connectors except for the flare angle. When the straight threads are engaged, the 45 male seat seals on the 45 female flare seat. 45 connectors are commonly found in automotive and refrigeration applications, on brass adapters, and are generally used at lower pressures than 37 JIC connectors. Check the threads and flares carefully to make positive identification.

Click here for a guide on how to properly measure threads.

Click here for a printable, actual size 45 flare fitting profiles. You will need to have Adobe Reader to view and print the file.


SAE J512, 45 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 5/8-18 15.7 .62 14.2 .56
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 1/16-14 26.9 1.06 25.1 .99
14 7/8 1 -12 31.7 1.25 29.5 1.16
16 1 1 3/8-12 35.0 1.38 32.5 1.28

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