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 6320-01-481-7322
NSN 5985-01-359-0761
NSN 6685-01-281-8860
NSN 5855-01-225-5855
NSN 5855-01-359-5727
NSN 5930-00-167-0531
NSN 5925-01-168-3943
NSN 4140-01-594-6862
NSN 5998-01-282-2957
NSN 5930-00-908-2289
NSN 5855-01-616-4391
NSN 6135-01-278-9717