AN Fitting O-Ring Reference Chart
The following chart outlines the proper O-ring sizes that should be used in “AN” O-ring Boss Fittings.
C&R Racing recommends the use of Buna-N (Nitrile) O-rings
for most cooling systems applications. For extreme temperature applications we suggest using Viton O-rings.
Upon installation always remember to lubricate the o-ring and check for damage.
|
AN Size
|
Thread Size
|
O-ring Size
|
|
-3
|
3/8-24
|
2-011
|
|
-4
|
7/16-20
|
2-012
|
|
-6
|
7/16-20
|
2-013
|
|
-8
|
3/4-16
|
2-016
|
|
-10
|
7/8-14
|
2-115
|
|
-12
|
1 1/16-12
|
2-119
|
|
-16
|
1 5/16-12
|
2-122
|
|
-20
|
1 5/8-12
|
2-128
|