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 2925-00-098-4165
NSN 5935-01-265-1111
NSN 6610-01-497-5061
NSN 6135-01-328-6583
NSN 5935-01-497-4081
NSN 5945-01-614-7668
NSN 5960-01-142-1995
NSN 6110-01-562-4717
NSN 5905-00-770-6699
NSN 7035-01-386-3004
NSN 5895-00-791-5661
NSN 5998-00-791-3720