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 6130-00-525-9271
NSN 5925-00-089-5596
NSN 5999-01-592-4905
NSN 5935-01-511-8377
NSN 5910-00-605-5254
NSN 5920-01-580-0777
NSN 5930-01-064-6849
NSN 6610-00-548-3452
NSN 6110-01-605-1590
NSN 5910-00-781-1945
NSN 5855-01-031-4729
NSN 5975-01-623-6865