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 5950-01-135-5438
NSN 6135-01-116-3385
NSN 6610-01-633-8931
NSN 6145-00-517-6666
NSN 5930-00-233-2665
NSN 6650-01-158-5099
NSN 6685-00-564-6971
NSN 5990-00-912-3297
NSN 5915-01-377-5033
NSN 6685-01-079-1791
NSN 6685-00-908-3072
NSN 5990-01-013-4569