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 5915-01-094-7427
NSN 6130-01-442-7945
NSN 6150-01-169-6991
NSN 5835-00-554-0399
NSN 5905-01-465-4817
NSN 6685-01-547-0702
NSN 6135-01-442-4581
NSN 5990-00-070-3006
NSN 6105-00-588-7513
NSN 5999-01-508-3407
NSN 5965-01-168-8180
NSN 5915-00-410-8874