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 5920-01-450-8382
NSN 6650-00-820-4577
NSN 5910-01-037-2770
NSN 6130-01-424-0360
NSN 5910-01-294-6659
NSN 5920-01-123-9854
NSN 6650-00-067-3572
NSN 5895-01-513-1873
NSN 6320-01-495-1244
NSN 6135-00-643-4843
NSN 6220-01-246-2303
NSN 6105-01-492-6227