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 5999-00-885-3514
NSN 4140-00-587-7496
NSN 6645-00-467-6094
NSN 5835-00-647-2104
NSN 6110-01-360-6507
NSN 5895-00-708-9703
NSN 6150-01-137-9127
NSN 5960-01-051-1454
NSN 6645-01-277-9337
NSN 5905-01-278-4197
NSN 5999-00-052-6542
NSN 5855-01-338-1718