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 6240-00-708-2083
NSN 5945-00-189-8783
NSN 6685-01-027-1168
NSN 5920-00-631-3528
NSN 2925-01-112-8782
NSN 6110-00-975-7219
NSN 5999-01-089-5429
NSN 5960-01-628-2760
NSN 6650-01-303-4662
NSN 6685-01-440-8749
NSN 6145-01-488-7822
NSN 2925-01-065-0060