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 5920-00-131-9975
NSN 5975-01-575-8842
NSN 2925-01-384-4139
NSN 6145-01-541-5422
NSN 5960-00-269-4762
NSN 5985-01-625-3974
NSN 6240-00-495-6763
NSN 5935-00-216-7435
NSN 6320-01-607-1491
NSN 5960-00-389-2915
NSN 6645-00-145-6411
NSN 6610-01-412-0058