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 5920-00-054-0172
NSN 5895-01-444-1167
NSN 5965-01-627-0848
NSN 4140-01-384-2351
NSN 6150-01-546-1323
NSN 6145-01-442-8143
NSN 5998-01-094-0831
NSN 5935-00-394-3726
NSN 6105-01-348-5132
NSN 5905-01-132-5263
NSN 5960-00-995-2554
NSN 5990-01-073-4782