A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 4140-01-047-1920
NSN 5855-01-428-9456
NSN 5855-00-308-0474
NSN 5925-01-495-3727
NSN 5950-00-179-7927
NSN 5999-00-890-5552
NSN 6130-00-540-5305
NSN 6320-00-238-9973
NSN 5945-01-029-3871
NSN 2925-00-446-6453
NSN 5935-00-314-4509
NSN 6105-00-303-9756