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 6145-01-441-9225
NSN 6620-01-633-8443
NSN 6240-01-008-1215
NSN 6685-01-512-2988
NSN 6650-01-632-3135
NSN 5910-01-346-7817
NSN 6150-01-415-5148
NSN 7035-01-338-9971
NSN 6110-00-725-3421
NSN 5999-01-233-2875
NSN 5998-01-504-0000
NSN 5996-00-051-6667