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 5998-00-483-9067
NSN 5855-00-610-4052
NSN 6610-01-304-3226
NSN 6130-00-068-1885
NSN 5915-01-299-4478
NSN 6240-01-336-8337
NSN 5990-00-562-8413
NSN 5975-00-931-2281
NSN 5999-01-005-0321
NSN 5996-01-307-8690
NSN 6105-00-012-6796
NSN 6620-01-189-8153