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 6240-00-313-2515
NSN 6685-00-813-9653
NSN 6110-01-502-5617
NSN 5975-01-180-9892
NSN 5905-00-997-5648
NSN 5998-00-363-8083
NSN 6150-01-516-3299
NSN 6320-00-284-1524
NSN 6105-01-181-5963
NSN 5998-01-487-6327
NSN 2925-00-149-0760
NSN 4140-01-055-6355