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 4140-00-269-5795
NSN 5910-01-342-8899
NSN 5999-00-170-1562
NSN 5950-01-503-0747
NSN 5996-00-823-4568
NSN 5960-00-096-2060
NSN 5915-01-508-1561
NSN 6130-01-087-2985
NSN 6610-01-598-3036
NSN 5990-01-516-9665
NSN 6135-00-635-9187
NSN 5835-01-652-4959