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 6145-01-139-1477
NSN 5998-01-278-3402
NSN 5910-01-028-5725
NSN 5930-00-314-5137
NSN 2925-01-376-9236
NSN 2925-01-370-6898
NSN 6150-00-422-1254
NSN 6320-00-456-0836
NSN 6220-01-259-0940
NSN 6240-01-275-1013
NSN 5920-00-147-3164
NSN 2925-01-559-5733