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 5960-01-207-9544
NSN 6645-01-237-2568
NSN 6320-00-036-3688
NSN 6220-01-464-8928
NSN 5910-00-725-5538
NSN 6685-00-488-1202
NSN 5930-00-434-9824
NSN 6220-00-793-3167
NSN 5975-01-420-6902
NSN 6220-00-443-0594
NSN 5920-01-163-6327
NSN 5935-01-462-0745