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 4140-01-511-4643
NSN 4140-01-490-0200
NSN 6220-00-958-7897
NSN 6320-01-227-2648
NSN 6610-01-198-3862
NSN 6320-01-215-2284
NSN 6135-00-299-6918
NSN 5965-01-371-8031
NSN 4140-01-204-2907
NSN 6150-01-299-5227
NSN 5905-00-832-6036
NSN 5905-01-536-2798