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 5835-01-399-5820
NSN 7035-00-402-4971
NSN 4140-01-012-3996
NSN 5965-01-005-0341
NSN 5945-00-946-2524
NSN 6110-01-286-3035
NSN 6130-01-497-0174
NSN 6220-01-570-1647
NSN 6150-00-911-9596
NSN 6240-00-170-5302
NSN 7035-00-631-3782
NSN 6685-01-447-5633