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 5990-00-125-5036
NSN 5915-00-633-1217
NSN 5915-01-463-3347
NSN 5999-01-630-6142
NSN 5905-01-435-6357
NSN 6135-01-579-3534
NSN 5930-00-052-1200
NSN 5915-01-281-8559
NSN 6645-00-385-3684
NSN 5999-00-456-0603
NSN 5945-01-104-7652
NSN 6685-01-171-4478