Used on 4610-01-505-2600. adapter assembly assy includes: 1 coupling half, 1 in female o.d. x 1 in male npt by external pipe thread, type vii, material aluminum (find no. 1) , 1 coupling, 1 in female npt x 3/4 in male ght on nsn 4730-01-511-2782 (p/n FM1076) ,