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 6135-01-430-3119
NSN 6685-01-149-2843
NSN 5960-01-276-7836
NSN 6685-00-967-0430
NSN 5835-00-905-7165
NSN 6240-00-097-8505
NSN 5950-00-552-1991
NSN 5965-01-303-6105
NSN 6130-01-428-9106
NSN 6110-01-421-4449
NSN 6685-00-684-1690
NSN 5895-00-737-4831