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 2925-01-560-4123
NSN 6220-01-363-4632
NSN 6220-01-475-9630
NSN 5950-01-403-2852
NSN 4140-00-101-7903
NSN 5935-01-051-5606
NSN 5965-01-419-8200
NSN 5999-00-171-1347
NSN 5920-01-193-8513
NSN 5935-00-131-9834
NSN 6645-00-925-2887
NSN 6620-00-858-7317