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 5945-01-170-6096
NSN 5996-01-487-4377
NSN 5999-00-021-4914
NSN 5905-01-225-9396
NSN 5998-01-008-4999
NSN 6610-00-500-6944
NSN 6105-01-459-8823
NSN 6645-00-092-5091
NSN 6105-01-158-7618
NSN 6685-00-004-8980
NSN 5930-01-593-7188
NSN 6130-01-025-5995