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 5895-00-709-2617
NSN 6650-01-647-1086
NSN 5935-00-129-3211
NSN 5945-01-108-5433
NSN 5965-01-100-2591
NSN 5998-01-601-5481
NSN 5855-01-218-3735
NSN 5965-00-111-2073
NSN 5950-01-444-4588
NSN 5990-00-455-9865
NSN 6645-01-547-0300
NSN 6685-00-477-7177