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 6135-01-513-3581
NSN 6610-01-432-4361
NSN 5990-00-165-1809
NSN 5999-01-134-5407
NSN 6135-01-167-7604
NSN 2925-01-648-6859
NSN 2925-00-749-8893
NSN 5920-01-032-2133
NSN 5985-00-274-9778
NSN 6135-01-604-8739
NSN 6320-01-512-2031
NSN 6220-01-336-2694