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 6320-01-491-0327
NSN 6130-00-037-9625
NSN 7035-00-096-9986
NSN 6620-00-302-3299
NSN 6240-01-219-7356
NSN 6650-01-056-5418
NSN 6135-01-327-2092
NSN 6150-01-595-2082
NSN 6105-00-453-3445
NSN 6130-01-268-4227
NSN 6240-00-113-8820
NSN 5945-01-499-1677