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 5935-00-168-9219
NSN 6610-01-633-8931
NSN 5835-01-268-1924
NSN 6150-01-520-6854
NSN 5998-01-487-6913
NSN 5920-00-824-0234
NSN 6650-01-132-6860
NSN 6130-01-081-2360
NSN 5985-01-415-9208
NSN 6220-01-555-8332
NSN 4140-00-200-0970
NSN 6650-01-142-3805