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 6320-01-576-6310
NSN 5935-01-285-3734
NSN 5975-01-026-8970
NSN 5855-00-256-5562
NSN 4140-01-247-0306
NSN 6685-00-408-6886
NSN 6685-00-813-8802
NSN 5835-01-192-4165
NSN 6685-01-133-4305
NSN 6645-01-275-5328
NSN 5915-01-033-2414
NSN 5930-00-391-6323