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 5895-01-254-0806
NSN 5985-01-503-8678
NSN 5985-01-630-5514
NSN 6610-01-359-9809
NSN 7035-00-008-4173
NSN 5835-01-485-1408
NSN 5990-01-069-8649
NSN 5975-01-590-0095
NSN 6110-01-523-1165
NSN 5835-00-811-4554
NSN 5930-00-416-6946
NSN 5935-01-181-5363