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 5930-01-406-5243
NSN 6240-01-162-7967
NSN 4140-01-589-5955
NSN 6135-01-273-1253
NSN 5915-00-841-5817
NSN 5905-01-459-8734
NSN 5855-00-411-8688
NSN 4140-01-092-9847
NSN 5975-01-156-9498
NSN 5990-00-105-7831
NSN 5920-01-396-9278
NSN 6320-00-242-3300