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 4140-00-572-2131
NSN 4140-01-377-5828
NSN 6110-01-537-0889
NSN 6650-01-089-8890
NSN 6685-01-487-4599
NSN 5998-01-543-4592
NSN 5920-01-357-5785
NSN 5930-01-502-1561
NSN 6320-01-547-9877
NSN 5990-01-341-5735
NSN 6620-01-414-4578
NSN 6220-01-126-8275