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 5965-01-179-7749
NSN 6620-01-160-0439
NSN 6645-00-255-1369
NSN 6685-01-521-3127
NSN 5990-00-369-5212
NSN 6110-01-323-1064
NSN 7035-01-008-7248
NSN 6320-01-449-1014
NSN 5895-01-378-8686
NSN 5895-01-038-5736
NSN 6145-00-414-5315
NSN 6650-01-534-3587