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 5920-00-518-1793
NSN 5935-00-373-9350
NSN 6620-00-606-0446
NSN 6110-01-411-0787
NSN 5925-01-196-2083
NSN 6685-01-138-4171
NSN 5935-01-488-7283
NSN 5990-00-491-1338
NSN 6135-01-167-7604
NSN 5925-01-328-9762
NSN 5895-00-949-7898
NSN 5998-01-420-6378