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 6220-00-932-4083
NSN 6130-00-421-7657
NSN 2925-00-243-6841
NSN 2925-00-005-1618
NSN 4140-01-592-2394
NSN 5996-01-605-3377
NSN 5920-01-342-3681
NSN 7035-01-251-9566
NSN 5915-01-609-6955
NSN 5990-01-097-4721
NSN 5930-01-360-8405
NSN 6135-01-556-3352