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 4140-00-100-4563
NSN 5915-01-135-9847
NSN 5905-01-510-9397
NSN 6135-01-079-7852
NSN 6110-00-190-7523
NSN 6320-00-809-5744
NSN 2925-00-174-4322
NSN 5960-01-331-3817
NSN 6130-01-338-5962
NSN 5910-00-349-0325
NSN 6220-01-656-6020
NSN 4140-01-110-7685