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 5990-00-936-3947
NSN 5835-00-400-2874
NSN 6220-01-160-7247
NSN 5999-01-438-1601
NSN 6220-01-571-2673
NSN 6135-00-932-3136
NSN 5990-00-164-1198
NSN 5975-01-237-1081
NSN 5965-00-164-8092
NSN 5998-01-484-9139
NSN 5975-00-312-1410
NSN 5925-01-398-3240