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 5930-00-925-0093
NSN 6610-01-159-0438
NSN 5998-00-752-1162
NSN 6220-01-437-9002
NSN 5835-01-202-9673
NSN 5935-01-186-9732
NSN 6135-01-519-7879
NSN 5990-00-543-2755
NSN 6240-00-299-9819
NSN 5925-01-303-5306
NSN 5925-00-544-5980
NSN 5990-01-043-7100