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 6650-00-246-3751
NSN 5996-00-475-0280
NSN 4140-01-323-3983
NSN 5905-00-686-1139
NSN 5998-01-226-4227
NSN 6145-01-503-7378
NSN 6150-00-099-0220
NSN 6645-00-241-3280
NSN 5998-01-051-1451
NSN 6135-01-204-3882
NSN 6145-00-761-2878
NSN 5975-00-952-1791