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 6685-00-265-0912
NSN 5895-00-406-6450
NSN 5999-01-148-5328
NSN 5915-01-439-1379
NSN 5996-01-642-5575
NSN 6145-00-184-1110
NSN 6685-00-377-9044
NSN 6320-00-908-6841
NSN 5950-00-100-1345
NSN 5985-00-956-8209
NSN 5855-01-135-9664
NSN 6135-00-297-8873