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 5960-01-112-0721
NSN 4140-01-209-1980
NSN 5925-01-501-5213
NSN 5945-01-627-8308
NSN 6110-00-141-1966
NSN 5998-01-217-8019
NSN 6650-00-495-8710
NSN 4140-01-210-0107
NSN 5835-01-010-3103
NSN 5910-01-278-9009
NSN 4140-00-660-8699
NSN 6645-01-322-5644