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 5945-01-322-7960
NSN 5950-01-381-1361
NSN 4140-01-392-6165
NSN 5855-00-921-6589
NSN 2925-01-444-6676
NSN 6150-01-047-4180
NSN 6145-01-105-1995
NSN 6220-01-100-4340
NSN 6645-00-226-2270
NSN 4140-01-580-3291
NSN 5935-01-260-2440
NSN 6650-00-717-8913