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 6220-01-006-3057
NSN 6110-00-071-2783
NSN 5910-00-495-9056
NSN 5920-01-392-1484
NSN 7035-01-100-9295
NSN 6685-01-335-3260
NSN 6610-01-425-4466
NSN 5905-01-216-1001
NSN 6110-01-185-4039
NSN 6240-01-068-3491
NSN 6610-01-530-9167
NSN 7035-00-369-6346