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 2925-01-408-9485
NSN 4140-01-218-5919
NSN 5920-00-341-3210
NSN 5965-01-435-3414
NSN 6145-00-581-1622
NSN 5935-00-230-1819
NSN 5930-00-070-0751
NSN 6110-01-535-0167
NSN 5895-00-803-9829
NSN 5945-01-456-1340
NSN 5905-01-269-9383
NSN 5990-01-347-1478