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 5990-01-138-8981
NSN 5930-01-106-3949
NSN 6220-01-505-8041
NSN 6105-00-974-4298
NSN 5915-01-205-2933
NSN 6105-01-067-4739
NSN 6620-01-142-8494
NSN 6150-00-081-2063
NSN 5915-01-443-8662
NSN 5985-00-897-7865
NSN 5905-01-223-6364
NSN 6135-01-271-3966