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 5905-01-406-6613
NSN 5935-01-647-1174
NSN 6145-00-515-6931
NSN 6110-00-141-1966
NSN 5910-01-533-1457
NSN 6610-01-146-0331
NSN 5950-01-535-7276
NSN 5960-01-058-8582
NSN 5975-01-463-3173
NSN 5950-01-633-8819
NSN 5925-01-472-1213
NSN 6145-01-296-1755