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 5990-01-249-8212
NSN 6685-00-827-3135
NSN 5895-00-456-0830
NSN 4140-00-995-3268
NSN 5999-00-293-9788
NSN 6240-01-407-5690
NSN 5985-01-533-4696
NSN 5975-01-558-7375
NSN 5895-01-296-8843
NSN 5930-01-151-7917
NSN 5965-01-269-4338
NSN 5998-00-865-9337