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 5996-00-880-4083
NSN 6110-01-495-1158
NSN 6110-00-005-7878
NSN 5950-01-113-7834
NSN 5855-01-580-6760
NSN 6645-01-144-4408
NSN 5835-01-184-6878
NSN 5835-01-281-7281
NSN 6320-01-281-6028
NSN 6150-01-470-1605
NSN 2925-01-609-6831
NSN 6220-01-471-7058