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 4140-00-987-7532
NSN 5965-01-611-0131
NSN 5905-01-605-2401
NSN 6320-00-908-6841
NSN 5855-01-481-0819
NSN 6645-01-256-6376
NSN 6320-01-195-5583
NSN 5990-01-598-8769
NSN 5999-01-215-3045
NSN 5920-00-069-3039
NSN 6685-01-550-1591
NSN 6685-01-341-9325