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 5920-01-145-4979
NSN 6110-01-599-1541
NSN 5925-01-494-6619
NSN 5910-00-276-6883
NSN 5855-01-623-8582
NSN 5835-00-744-1277
NSN 5965-01-129-1968
NSN 5985-00-915-3603
NSN 5925-00-726-4468
NSN 6620-00-922-2828
NSN 5996-01-579-6558
NSN 6130-00-466-2019