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 5835-01-018-6294
NSN 5990-01-178-6307
NSN 6110-00-598-2574
NSN 5935-01-511-6483
NSN 6645-00-079-1430
NSN 5985-00-882-3016
NSN 5905-01-580-5501
NSN 5950-01-620-9003
NSN 5925-01-071-3997
NSN 5945-00-068-5956
NSN 6650-00-112-8361
NSN 4140-00-331-0685