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 5960-01-017-0989
NSN 5915-01-073-2578
NSN 5965-01-063-7894
NSN 6610-00-141-7000
NSN 5835-01-602-0311
NSN 6685-01-488-5138
NSN 6130-00-237-8541
NSN 5985-01-132-7578
NSN 6645-01-569-9087
NSN 5910-01-265-8620
NSN 5985-00-890-0607
NSN 5996-00-277-7384