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 5925-01-068-0793
NSN 5905-00-581-5751
NSN 5996-00-130-5376
NSN 6610-01-435-0847
NSN 6645-00-085-7603
NSN 6150-00-779-5547
NSN 5950-00-353-1421
NSN 5960-01-265-0354
NSN 4140-00-269-8545
NSN 6110-01-056-4964
NSN 5935-01-551-7069
NSN 5965-00-678-6925