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 6110-00-421-1650
NSN 5920-01-422-4151
NSN 5855-01-312-5160
NSN 6650-01-500-7460
NSN 2925-01-029-5300
NSN 5895-00-167-7995
NSN 5975-01-069-4689
NSN 5895-01-650-2507
NSN 5975-00-822-2889
NSN 5835-01-173-1578
NSN 5945-01-113-4836
NSN 6685-01-442-2395