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 5915-01-353-9902
NSN 6685-01-425-2768
NSN 5895-01-050-8909
NSN 5835-01-135-2601
NSN 6105-01-321-7466
NSN 6610-01-257-5808
NSN 5960-01-369-8666
NSN 5930-01-558-5496
NSN 5985-00-366-5192
NSN 6130-01-192-9836
NSN 2925-01-299-6967
NSN 5915-01-435-5275