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 4140-00-147-8971
NSN 6620-01-168-8244
NSN 5930-01-477-0247
NSN 5835-01-185-1102
NSN 5925-00-591-2792
NSN 5945-01-473-7568
NSN 5975-01-554-2688
NSN 6645-01-452-8469
NSN 5925-00-144-0482
NSN 5950-00-964-7450
NSN 4140-01-079-6886
NSN 6135-01-422-1440