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 5998-01-032-3930
NSN 5990-01-107-1003
NSN 6150-01-180-9718
NSN 7035-00-096-9986
NSN 6320-01-406-6098
NSN 5920-00-404-1078
NSN 5975-00-458-3038
NSN 6240-01-081-3190
NSN 5910-01-054-2068
NSN 5998-01-439-9468
NSN 6145-00-408-1724
NSN 6145-00-656-5329