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 2925-01-531-6811
NSN 5915-00-932-1403
NSN 5965-01-019-0939
NSN 7035-01-567-5486
NSN 5945-01-547-0678
NSN 5935-01-127-9283
NSN 5920-01-181-6369
NSN 5960-01-543-0235
NSN 5965-01-222-0166
NSN 6145-01-502-9751
NSN 5998-01-426-3443
NSN 2925-01-320-0965