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 5990-01-084-0807
NSN 6135-01-218-3660
NSN 5990-00-707-0731
NSN 5950-01-550-5579
NSN 5990-00-932-3070
NSN 5998-01-380-5326
NSN 2925-00-211-4761
NSN 6610-01-418-3284
NSN 5835-01-463-2334
NSN 6240-01-171-9500
NSN 5835-01-362-1946
NSN 5915-01-369-6414