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 5999-01-309-2393
NSN 5965-01-526-6131
NSN 6650-01-633-9147
NSN 6650-01-345-2866
NSN 4140-01-025-8487
NSN 6650-00-834-9062
NSN 6685-01-034-9114
NSN 5910-01-025-2115
NSN 5965-01-148-4979
NSN 5855-01-147-6024
NSN 5935-00-952-6458
NSN 5835-01-558-9444