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 5910-00-139-4808
NSN 5925-01-100-8474
NSN 5996-01-574-8853
NSN 6620-01-379-1235
NSN 6220-01-516-9470
NSN 4140-01-558-9993
NSN 5985-01-348-6579
NSN 6240-01-413-8028
NSN 4140-01-101-0585
NSN 6145-00-136-9132
NSN 5915-00-262-5788
NSN 5960-01-043-8414