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 5990-00-636-4218
NSN 5965-01-016-1606
NSN 5925-01-117-5068
NSN 5855-01-556-7421
NSN 4140-01-463-9299
NSN 5998-01-304-6447
NSN 5915-01-478-5308
NSN 5999-01-591-5234
NSN 6685-01-616-6133
NSN 5915-01-392-4409
NSN 5930-01-472-7451
NSN 6110-01-300-0802