A circular shaped item with an aperture manufactured to predetermined dimensions, constructed with a rectangular cross section that may be solid, with joint, or in a helical form that facilitates spiral wrap installation. It prevents seal extrusion under pressure and is designed to fit on the down-pressure side of a gland groove with a packing, preformed or o-ring.
NSN 7035-00-179-3924
NSN 5990-01-462-1617
NSN 5920-01-071-5076
NSN 6220-00-153-9704
NSN 5945-00-583-8124
NSN 5935-00-204-8925
NSN 6685-01-241-8006
NSN 6610-00-719-6882
NSN 5835-01-086-4849
NSN 5835-01-647-6426
NSN 5910-01-438-9209
NSN 6685-01-032-9706