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 6135-00-519-1325
NSN 6320-01-299-6367
NSN 4140-00-236-1089
NSN 5950-01-430-3338
NSN 6130-01-392-1134
NSN 2925-01-152-8618
NSN 5855-00-256-5562
NSN 6645-00-692-2809
NSN 5930-01-032-4502
NSN 5960-01-201-6316
NSN 5960-00-108-0250
NSN 6620-01-382-4744