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 5945-01-139-4260
NSN 6105-00-478-8988
NSN 5996-00-458-4275
NSN 7035-00-931-9415
NSN 5990-01-516-9665
NSN 6150-00-128-5992
NSN 6240-00-842-2887
NSN 5895-00-515-6368
NSN 5905-00-258-9122
NSN 6620-01-645-8717
NSN 5975-01-169-3580
NSN 5945-00-972-6432