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 5895-01-428-9966
NSN 5935-00-765-4306
NSN 5930-01-011-2689
NSN 6130-00-161-2418
NSN 5930-01-143-0975
NSN 6320-01-157-4400
NSN 5990-01-548-3711
NSN 5996-00-222-9632
NSN 6135-00-299-6918
NSN 2925-01-554-5246
NSN 5950-00-850-8375
NSN 6150-00-365-1711