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 4140-00-229-8467
NSN 2925-01-479-3806
NSN 6105-01-381-0411
NSN 2925-01-248-6028
NSN 4140-01-562-3906
NSN 6135-00-643-4843
NSN 5950-01-418-1738
NSN 6645-01-406-0688
NSN 5965-01-252-3987
NSN 5950-01-423-0082
NSN 5950-01-443-6364
NSN 5910-01-030-7077