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 5910-01-378-4277
NSN 5950-00-823-5969
NSN 6220-01-284-6347
NSN 5905-01-003-9660
NSN 7035-01-218-6960
NSN 2925-01-528-7333
NSN 6220-00-548-1999
NSN 5999-00-519-5455
NSN 5835-01-026-0670
NSN 6620-00-280-2874
NSN 5996-01-318-1407
NSN 5930-01-097-7377