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 6220-00-160-1298
NSN 6610-01-222-0582
NSN 6105-01-539-3344
NSN 6130-01-452-1874
NSN 5950-00-228-9365
NSN 6650-01-226-2397
NSN 5835-00-269-2232
NSN 5960-00-241-2911
NSN 5925-00-401-1077
NSN 5950-01-169-4657
NSN 5835-01-538-8080
NSN 5855-00-962-5792