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 6135-00-500-2082
NSN 6685-01-197-7064
NSN 4140-01-440-4379
NSN 5960-01-503-8411
NSN 5998-01-313-3442
NSN 5935-01-398-9114
NSN 5945-01-141-7497
NSN 5945-00-706-8508
NSN 6110-01-364-9779
NSN 6320-00-456-2092
NSN 6130-01-119-8130
NSN 5996-01-263-3539