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 5998-01-437-5728
NSN 6650-01-047-6719
NSN 6110-01-059-8599
NSN 5925-01-547-0661
NSN 5915-01-349-3303
NSN 5915-01-448-5314
NSN 5945-01-304-4925
NSN 5950-01-527-1987
NSN 6110-01-652-2895
NSN 6320-01-419-1225
NSN 6105-00-799-6532
NSN 5915-01-102-1532