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 5998-01-012-0491
NSN 5965-00-518-0958
NSN 5965-01-140-9446
NSN 5935-00-406-6416
NSN 5895-01-246-0327
NSN 6620-01-483-1138
NSN 5910-01-307-8395
NSN 5945-01-466-5575
NSN 5999-01-519-6882
NSN 6150-01-302-1655
NSN 6105-01-302-4558
NSN 5920-00-148-4622