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 5990-00-905-2474
NSN 5950-00-945-9046
NSN 5950-01-441-7380
NSN 5930-00-950-3928
NSN 6145-01-364-7837
NSN 6135-01-265-1384
NSN 5835-00-503-2608
NSN 5965-01-623-0902
NSN 5985-00-250-5876
NSN 5930-01-502-6704
NSN 6135-00-461-3590
NSN 6610-01-572-1715