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 6685-01-158-6081
NSN 6145-01-164-4556
NSN 6620-00-413-4695
NSN 5945-01-195-4718
NSN 5945-01-013-8440
NSN 5985-01-476-8978
NSN 5960-01-628-2760
NSN 5935-01-438-1485
NSN 5920-01-118-0309
NSN 5985-00-121-1915
NSN 6620-00-102-7442
NSN 2925-00-127-7828