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 6220-00-419-6152
NSN 6150-01-151-4684
NSN 5855-01-436-7621
NSN 5855-01-625-6106
NSN 6240-01-542-1448
NSN 6150-00-834-0537
NSN 5999-01-642-0960
NSN 5998-00-759-1402
NSN 5920-01-077-1756
NSN 5855-00-256-5562
NSN 5925-01-119-7888
NSN 6610-01-473-5678