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 5985-00-975-5433
NSN 5960-01-117-8671
NSN 4140-00-087-4611
NSN 6145-00-275-4011
NSN 5999-01-613-2551
NSN 5925-01-641-6549
NSN 6650-01-103-7342
NSN 5855-00-221-9435
NSN 6145-00-827-4958
NSN 6150-00-125-6955
NSN 5835-01-182-1966
NSN 4140-00-173-0706