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 4140-00-938-8664
NSN 4140-00-580-8508
NSN 6220-00-260-9390
NSN 6220-01-123-9290
NSN 5835-00-427-2772
NSN 5975-00-216-4848
NSN 5950-01-641-2901
NSN 6240-01-213-4905
NSN 6610-01-247-6374
NSN 5905-00-137-0811
NSN 5975-01-609-8939
NSN 6645-01-524-7027