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 6240-00-973-8390
NSN 5998-00-231-8949
NSN 6150-00-125-9572
NSN 4140-01-210-1929
NSN 6150-00-100-1302
NSN 6145-01-471-0552
NSN 5975-00-661-1832
NSN 6145-00-224-5245
NSN 5975-01-595-6620
NSN 6320-01-334-9840
NSN 5920-01-238-2174
NSN 5999-01-565-3877