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 5975-01-537-1808
NSN 5905-01-349-9502
NSN 5999-01-481-4762
NSN 6240-01-470-6387
NSN 6105-00-948-0477
NSN 7035-01-263-0154
NSN 5855-01-387-1928
NSN 6645-01-226-6573
NSN 6685-01-359-1760
NSN 5835-01-187-8986
NSN 5990-01-258-3848
NSN 5945-00-417-9952