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 4140-00-701-0406
NSN 6130-01-421-2705
NSN 4140-00-483-1932
NSN 6105-01-628-0605
NSN 5930-00-376-9991
NSN 6320-00-456-0836
NSN 6150-01-218-6019
NSN 6645-01-013-6254
NSN 5930-01-425-3649
NSN 5975-00-460-8784
NSN 6145-01-535-0693
NSN 2925-00-288-1394