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 6135-01-383-0151
NSN 6320-00-731-6134
NSN 6105-00-624-4611
NSN 6645-00-998-7820
NSN 5935-01-651-2092
NSN 5950-00-467-1440
NSN 6645-00-376-4829
NSN 5965-00-877-9197
NSN 5975-01-657-3463
NSN 5998-01-004-9340
NSN 4140-00-152-7092
NSN 5905-00-971-5004