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 5950-01-576-6987
NSN 6645-00-896-9430
NSN 6130-00-434-8749
NSN 5960-01-503-0362
NSN 6105-00-346-7301
NSN 5945-01-576-5936
NSN 6130-01-386-2894
NSN 6620-00-726-4849
NSN 6110-00-777-8749
NSN 5915-01-294-9299
NSN 5945-00-681-0026
NSN 6145-01-050-7531