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 5910-01-441-7321
NSN 5905-00-583-0787
NSN 5945-00-170-4160
NSN 4140-01-538-8281
NSN 5920-01-126-8826
NSN 5915-01-142-2018
NSN 5855-01-656-6808
NSN 5930-00-898-5450
NSN 5935-01-306-1179
NSN 6620-01-152-0936
NSN 5855-01-210-7636
NSN 6130-01-529-7000