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 6135-00-676-5807
NSN 6620-01-118-2337
NSN 5990-00-933-0526
NSN 5985-00-925-1216
NSN 5945-01-351-0466
NSN 6240-01-123-9040
NSN 5895-00-221-4889
NSN 6645-01-304-4308
NSN 5990-01-136-4068
NSN 6240-01-172-5981
NSN 5950-01-634-0677
NSN 6150-01-116-6898