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 5835-01-137-6075
NSN 5935-01-099-4634
NSN 6240-01-476-1612
NSN 5960-00-615-9972
NSN 5965-00-051-0815
NSN 5925-01-222-3212
NSN 7035-00-915-5798
NSN 6130-00-064-0678
NSN 5996-00-800-7628
NSN 6650-00-514-3531
NSN 2925-00-373-8837
NSN 5945-00-389-7948