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 5910-01-343-0289
NSN 2925-01-550-0177
NSN 5910-01-359-8909
NSN 5990-01-395-4194
NSN 5960-00-368-4084
NSN 6135-01-377-5729
NSN 5855-01-147-4785
NSN 6150-01-413-0193
NSN 6610-01-360-3564
NSN 6240-00-066-0714
NSN 6650-01-119-3058
NSN 5985-01-032-5715