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 6320-00-004-9158
NSN 6620-00-273-8735
NSN 5996-01-219-9512
NSN 6650-00-078-5773
NSN 5965-01-558-8863
NSN 6220-01-371-1791
NSN 6320-01-523-4954
NSN 6685-00-925-3288
NSN 5905-00-171-2158
NSN 6240-01-401-5340
NSN 5960-01-462-1864
NSN 6240-01-210-8467