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 6105-01-331-8326
NSN 5990-01-578-5382
NSN 6650-00-242-7961
NSN 5985-00-600-7104
NSN 5935-01-558-4780
NSN 6145-00-158-8704
NSN 6620-00-237-9395
NSN 4140-00-840-2082
NSN 6220-00-121-7541
NSN 4140-01-161-8075
NSN 6240-01-425-1545
NSN 5996-01-447-4916