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 6650-01-033-2979
NSN 5998-01-472-8954
NSN 5935-01-017-1199
NSN 6240-01-415-2858
NSN 6240-00-289-7059
NSN 6135-01-506-0759
NSN 5930-00-368-8006
NSN 5935-01-359-1812
NSN 6240-01-220-1438
NSN 5950-01-414-2553
NSN 5935-01-477-9496
NSN 6105-01-263-6374