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 4140-01-145-4474
NSN 6110-01-431-8889
NSN 2925-01-604-8984
NSN 5935-00-891-9802
NSN 5930-00-224-8402
NSN 5910-01-359-9055
NSN 5996-01-415-1818
NSN 6110-01-070-2729
NSN 5905-01-634-0595
NSN 5985-01-416-7190
NSN 5960-00-855-8792
NSN 6110-01-238-3953