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 5985-01-068-4667
NSN 5855-01-223-0833
NSN 5945-01-496-9659
NSN 6145-00-013-9939
NSN 5985-01-090-1100
NSN 5975-01-618-0048
NSN 6110-01-434-7461
NSN 6130-01-128-3058
NSN 5855-00-235-2676
NSN 6320-00-731-6134
NSN 5990-01-632-0969
NSN 5835-01-632-6627