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 5960-01-214-4518
NSN 5935-01-479-5019
NSN 6240-01-462-1874
NSN 6620-01-421-3917
NSN 5910-00-137-5914
NSN 6320-01-607-1491
NSN 5950-00-725-3394
NSN 6220-01-290-3081
NSN 2925-01-386-7392
NSN 6650-01-406-4959
NSN 5996-00-212-8004
NSN 2925-01-277-0873