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 6150-01-012-5204
NSN 5999-00-899-3285
NSN 6145-01-176-4047
NSN 6685-01-023-8007
NSN 5965-01-028-4136
NSN 5999-01-474-2828
NSN 6220-01-040-9002
NSN 6610-01-501-2024
NSN 6130-01-159-3697
NSN 5905-00-111-4418
NSN 4140-01-624-6592
NSN 2925-01-273-4898