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 2925-01-492-9863
NSN 6110-01-397-8803
NSN 5985-01-431-7448
NSN 5925-00-100-0102
NSN 6610-00-811-6072
NSN 5999-00-471-6061
NSN 5960-00-148-4493
NSN 6650-01-062-0828
NSN 5915-01-547-1911
NSN 5835-00-909-8088
NSN 5990-00-784-0910
NSN 5975-01-087-0808