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 6610-01-148-8865
NSN 6320-00-336-9123
NSN 5935-01-079-9106
NSN 6145-01-200-8643
NSN 2925-00-480-9068
NSN 6320-01-228-2380
NSN 6320-01-495-1244
NSN 5998-01-056-4354
NSN 5945-01-287-9219
NSN 5945-01-309-6050
NSN 2925-00-416-2894
NSN 6240-00-364-0850