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 6320-01-170-4068
NSN 5960-01-605-9921
NSN 6645-00-498-6869
NSN 4140-01-336-0980
NSN 6130-00-780-9452
NSN 6610-01-338-0628
NSN 5985-00-125-4630
NSN 6110-01-326-2541
NSN 5985-01-388-7828
NSN 4140-01-038-7659
NSN 5985-01-227-2646
NSN 5910-01-203-2711