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 5999-01-346-8504
NSN 5965-01-360-0454
NSN 5935-01-501-0383
NSN 5960-01-415-3574
NSN 6220-01-214-0270
NSN 6220-01-384-4609
NSN 5895-01-356-2411
NSN 5996-00-191-0396
NSN 6610-01-439-8513
NSN 5835-01-013-9321
NSN 6650-01-207-0829
NSN 5990-01-443-2931