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 5975-00-469-6672
NSN 5895-00-832-6555
NSN 5910-01-050-6504
NSN 5925-00-790-4903
NSN 6645-00-149-1100
NSN 6130-01-023-8031
NSN 5920-00-554-0437
NSN 5998-01-551-1232
NSN 5996-00-752-6007
NSN 5975-00-926-7563
NSN 5920-01-569-5751
NSN 5925-01-218-4711