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 6220-01-106-3215
NSN 6685-00-050-7721
NSN 5930-01-157-5014
NSN 6145-00-119-8201
NSN 6685-01-650-1828
NSN 5895-01-408-6857
NSN 5950-00-617-6807
NSN 5975-00-562-4914
NSN 6105-01-040-9677
NSN 6110-00-300-1876
NSN 6645-01-327-7362
NSN 5965-01-121-6135