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 5990-00-956-6297
NSN 6135-01-580-5726
NSN 5905-01-364-7844
NSN 2925-01-541-5031
NSN 6610-00-881-5060
NSN 6610-01-244-7192
NSN 6650-01-391-8464
NSN 6650-01-308-4563
NSN 4140-01-514-9303
NSN 6610-01-537-7260
NSN 6685-01-032-4752
NSN 6620-00-349-4703