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 5990-01-503-9804
NSN 6135-01-090-5365
NSN 6135-01-495-0933
NSN 5990-00-110-1153
NSN 6110-01-400-4207
NSN 5930-01-459-7252
NSN 5945-01-198-2497
NSN 5905-00-915-4477
NSN 2925-00-201-8247
NSN 5945-01-282-2798
NSN 5990-01-040-6358
NSN 5910-00-422-3784