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 5925-01-313-2378
NSN 6135-01-176-2206
NSN 5905-01-342-3918
NSN 7035-01-250-5744
NSN 6150-01-607-3002
NSN 5965-01-088-5414
NSN 5999-01-321-5094
NSN 5910-01-390-0883
NSN 5895-01-062-8803
NSN 6240-01-658-0181
NSN 6145-00-735-6257
NSN 6240-00-204-9355