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 6105-01-628-3534
NSN 6650-00-466-1697
NSN 6650-01-395-5991
NSN 5990-01-088-5293
NSN 6110-00-127-2829
NSN 6685-00-284-1070
NSN 5935-01-123-3820
NSN 7035-01-455-3482
NSN 6320-00-174-1362
NSN 6610-01-109-6405
NSN 5905-01-537-9647
NSN 6685-01-165-6997