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 6130-00-433-4933
NSN 6620-00-399-0087
NSN 5990-00-763-5526
NSN 5965-01-618-1435
NSN 6105-00-457-7134
NSN 5835-01-209-6410
NSN 6220-01-100-5093
NSN 6610-01-586-5221
NSN 5985-00-905-7167
NSN 6650-00-416-2953
NSN 2925-00-555-4578
NSN 6620-01-656-7448