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 5960-01-593-1936
NSN 5950-01-526-4747
NSN 5915-00-824-0196
NSN 6110-00-450-4366
NSN 5999-00-008-5282
NSN 5998-01-347-4199
NSN 6220-00-081-6429
NSN 5996-00-835-2605
NSN 6220-01-626-5797
NSN 2925-01-408-9362
NSN 6220-01-209-6219
NSN 4140-01-577-0245