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 5965-00-756-0457
NSN 6135-01-502-5787
NSN 5965-01-389-1068
NSN 5895-01-116-7160
NSN 6685-00-455-1735
NSN 5975-01-416-0684
NSN 5895-01-403-2793
NSN 5985-00-539-7997
NSN 6105-00-252-3233
NSN 5960-01-449-1310
NSN 5915-00-889-7568
NSN 5965-01-446-6945