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 6650-00-420-3593
NSN 6105-01-449-1046
NSN 5935-01-134-6257
NSN 5905-00-277-7439
NSN 5930-00-964-0057
NSN 5910-00-618-9927
NSN 5935-00-306-2222
NSN 5975-01-653-5042
NSN 5915-01-139-2395
NSN 6110-00-512-7845
NSN 6105-01-467-3694
NSN 6620-01-611-5908