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 5990-01-423-8189
NSN 5990-01-565-2226
NSN 5996-01-599-9867
NSN 5925-01-439-6213
NSN 4140-00-866-7015
NSN 5990-01-175-2597
NSN 5855-01-062-5655
NSN 6610-01-213-5782
NSN 5960-00-798-0087
NSN 6645-01-432-7026
NSN 5920-01-284-7306
NSN 5920-00-032-3316