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 5990-01-027-8260
NSN 5910-00-139-3364
NSN 5960-00-796-1664
NSN 5930-00-248-5053
NSN 4140-01-532-6669
NSN 5855-00-906-5386
NSN 5935-00-885-6897
NSN 5905-01-297-4181
NSN 4140-00-170-5152
NSN 6130-01-106-7754
NSN 5895-01-312-9468
NSN 5950-01-299-7687