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 5945-00-489-2479
NSN 6685-01-358-5314
NSN 5905-01-055-1131
NSN 5945-00-061-7267
NSN 5998-00-164-6349
NSN 5835-00-725-2087
NSN 5990-00-419-0236
NSN 2925-00-491-3549
NSN 6650-01-629-0096
NSN 5945-00-358-1960
NSN 6220-01-415-0553
NSN 5950-01-474-3749