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 7035-01-145-5059
NSN 6150-00-537-4333
NSN 5920-00-997-0157
NSN 6150-00-502-2692
NSN 2925-01-622-8568
NSN 5930-00-257-0025
NSN 5965-01-517-4269
NSN 5905-00-653-6448
NSN 5920-00-938-7660
NSN 6110-00-514-2639
NSN 5945-00-959-6309
NSN 6645-01-144-4408