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 6135-01-307-6006
NSN 6220-01-293-5450
NSN 5965-00-009-8679
NSN 6110-01-224-9433
NSN 6220-01-019-7606
NSN 4140-00-635-9195
NSN 5998-00-194-7640
NSN 4140-01-547-3656
NSN 7035-01-136-7404
NSN 6650-01-392-2204
NSN 2925-00-041-0439
NSN 5935-01-317-7760