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 6110-01-391-2710
NSN 5895-01-447-7262
NSN 5915-01-166-1908
NSN 6145-00-570-0516
NSN 5835-01-497-5029
NSN 6220-01-367-1877
NSN 6320-00-450-7014
NSN 5960-00-808-0784
NSN 5920-01-020-6812
NSN 6240-00-456-6238
NSN 6130-01-183-5604
NSN 5835-01-537-1228