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 5925-01-204-6888
NSN 5985-00-291-9974
NSN 5960-00-519-9880
NSN 6320-01-345-5818
NSN 6645-00-868-1246
NSN 6610-01-467-7068
NSN 5998-01-255-9882
NSN 6150-01-235-0523
NSN 5998-01-423-0538
NSN 6145-00-253-2787
NSN 5975-01-578-5422
NSN 6150-01-205-8218