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 5920-01-239-2038
NSN 5960-00-636-4834
NSN 2925-01-400-2286
NSN 5945-01-127-1866
NSN 6320-00-468-8421
NSN 6650-01-423-2834
NSN 5910-01-422-4924
NSN 6610-00-765-7174
NSN 5990-01-026-8628
NSN 6135-01-604-8739
NSN 6620-01-415-8550
NSN 6220-01-005-8038