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 5910-01-172-4084
NSN 5950-00-928-1793
NSN 5920-00-458-6388
NSN 6105-01-535-0308
NSN 7035-00-286-6221
NSN 6145-00-233-6010
NSN 6130-01-435-4424
NSN 6110-01-381-6092
NSN 4140-00-064-7847
NSN 6105-01-584-6454
NSN 5855-01-506-6767
NSN 5960-00-601-3118