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 5990-01-423-8189
NSN 5950-01-169-1462
NSN 5945-00-849-7736
NSN 5996-00-107-5357
NSN 5935-01-112-1255
NSN 5905-00-549-7692
NSN 5960-01-632-6576
NSN 5935-00-595-8269
NSN 6650-00-590-9073
NSN 5855-01-122-3125
NSN 4140-01-084-9429
NSN 5835-01-457-7951