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 6130-01-429-2290
NSN 5905-00-179-2336
NSN 5930-01-182-1370
NSN 2925-01-027-1293
NSN 6240-01-434-2361
NSN 6105-00-564-8192
NSN 5935-00-156-6834
NSN 5895-01-524-5529
NSN 5930-01-067-9796
NSN 5915-01-466-5326
NSN 5975-00-719-9793
NSN 6685-00-452-9738