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 6645-00-776-8234
NSN 6320-01-313-8306
NSN 5895-01-654-2484
NSN 4140-00-403-6637
NSN 5930-01-418-0584
NSN 2925-00-862-8550
NSN 6645-01-337-1806
NSN 5999-00-974-9569
NSN 5930-01-555-5008
NSN 5945-01-143-6640
NSN 6645-01-190-4297
NSN 5910-01-155-1103