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 5985-01-632-8120
NSN 6105-00-051-3392
NSN 6620-00-928-0227
NSN 5999-01-127-8299
NSN 7035-00-300-3208
NSN 5835-01-085-5487
NSN 4140-01-264-4952
NSN 6685-01-118-7117
NSN 5960-01-199-1157
NSN 6320-00-225-7013
NSN 5985-00-154-8795
NSN 6650-00-071-3102