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 5930-00-753-7890
NSN 5945-00-540-8178
NSN 5965-00-642-9879
NSN 5990-01-264-9759
NSN 5990-01-548-3711
NSN 5960-01-076-4708
NSN 5855-01-311-6666
NSN 6240-00-553-1923
NSN 6110-01-032-7957
NSN 6150-00-259-4632
NSN 5998-01-237-2324
NSN 4140-00-279-3148