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 6650-00-901-4914
NSN 6130-01-658-0532
NSN 6130-00-035-3898
NSN 5999-00-435-7002
NSN 6620-01-532-4147
NSN 5910-00-279-5960
NSN 2925-01-101-4188
NSN 5998-01-369-8853
NSN 5910-01-600-2613
NSN 5920-00-196-3631
NSN 5925-00-187-8860
NSN 6220-00-342-1086