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 6135-01-068-0119
NSN 5945-00-259-5500
NSN 5935-00-928-2103
NSN 6685-00-216-6676
NSN 7035-01-525-7673
NSN 5950-01-499-9180
NSN 6610-01-229-2424
NSN 5998-00-967-3648
NSN 5999-00-272-2175
NSN 5990-01-373-1465
NSN 5895-01-414-0679
NSN 5950-01-009-3215