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 5998-01-243-0420
NSN 5915-01-538-7581
NSN 5905-00-374-3600
NSN 7035-01-271-1643
NSN 5985-00-374-1062
NSN 5985-00-397-7296
NSN 6135-00-932-3136
NSN 6685-00-133-7812
NSN 5975-01-054-1834
NSN 5835-01-388-4616
NSN 6220-01-633-9889
NSN 6620-01-607-5738