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 7035-01-060-1227
NSN 5965-00-113-9748
NSN 6110-00-400-8824
NSN 5990-01-365-3453
NSN 6685-01-216-4146
NSN 5965-01-375-5238
NSN 4140-01-308-6651
NSN 5835-01-378-6804
NSN 6135-01-423-7502
NSN 5975-01-062-0874
NSN 5935-01-140-6590
NSN 5945-01-336-9406