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 5835-00-467-7294
NSN 6110-00-325-4519
NSN 5920-00-285-2245
NSN 5985-00-501-7816
NSN 2925-01-324-6423
NSN 6320-00-588-2401
NSN 6610-01-067-6591
NSN 6110-00-530-3779
NSN 5950-01-265-1682
NSN 5935-01-439-8988
NSN 6135-01-482-1290
NSN 5950-01-196-4654