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 5930-00-584-9313
NSN 5998-00-555-6318
NSN 6145-01-061-3058
NSN 5990-00-553-6716
NSN 5996-00-964-5229
NSN 5990-01-357-6175
NSN 6650-01-343-4170
NSN 6650-00-866-9947
NSN 5920-01-474-9385
NSN 5985-01-293-9219
NSN 6135-01-398-5922
NSN 6105-01-201-8257