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 5930-01-515-3837
NSN 5999-01-307-9260
NSN 6220-01-342-5191
NSN 5930-00-582-1730
NSN 5990-00-960-6310
NSN 5910-01-607-0879
NSN 5945-01-509-1199
NSN 7035-01-522-5597
NSN 6320-01-177-3192
NSN 2925-00-180-2532
NSN 5905-00-050-5803
NSN 5895-01-029-3791