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 4140-01-234-1736
NSN 5925-01-188-2512
NSN 5975-01-383-0246
NSN 6110-01-349-1614
NSN 5998-01-238-1904
NSN 6220-01-522-4937
NSN 5996-00-217-2654
NSN 2925-00-896-9819
NSN 6110-00-446-6099
NSN 6645-01-633-1852
NSN 6150-00-604-4418
NSN 5990-00-617-0535