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 5915-01-250-4684
NSN 5960-01-480-5734
NSN 5999-01-482-4861
NSN 6240-01-051-6720
NSN 5855-01-524-9353
NSN 6645-01-254-0490
NSN 5935-01-040-6758
NSN 5985-00-632-7826
NSN 6105-00-082-3210
NSN 5925-01-279-8216
NSN 5985-01-223-6445
NSN 6645-01-076-4655