These anodized billet aluminum adapter fittings can be used in any application using a 7/16"-20 O-ring port. This is the same thread pitch used in -4AN (ORB=O-Ring Boss). They all feature FKM O-rings for all oil and fuel types.
This outlet adapter fitting permits the use of the Bosch 16 14 9 068 988check valve that is included with the pump. Includes a crush washer to seal the inlet to the check valve surface. Requires a 10AN ORB fitting for the outlet of the adapter.