These adapter fittings are designed to be used in many Radium products including fuel rails, surge tanks, fuel pressure regulators, etc. However, they can be used in any application using a 3/4 Inch -16 O-ring port which is the same thread pitch used in -8AN (ORB=O-Ring Boss). Features3/4 Inch -16 O-Ring Port To -8AN MaleThe rear inlet port uses 3/4 Inch-16 female O-ring port threads to accept -6AN, -8AN, or -10AN adapter fittingsThe front port uses 3/8 Inch NPT female threads which permits the use of our fuel pulse damper.A low profile 90 degree swiveling adapter for tight locations.Fitment:UniversalNote:Images are for representation only. Actual product may vary