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 6145-00-360-7760
NSN 6645-01-369-4371
NSN 6240-01-285-3793
NSN 5935-01-196-4809
NSN 4140-01-407-9668
NSN 5996-01-331-6191
NSN 6150-01-514-6893
NSN 5945-01-630-1466
NSN 5975-01-227-6306
NSN 2925-01-487-0886
NSN 5985-01-518-9429
NSN 5999-01-229-5420