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 5910-01-432-7175
NSN 5990-01-044-1271
NSN 2925-00-964-7128
NSN 6220-01-242-9901
NSN 6150-01-331-5686
NSN 6145-01-605-8914
NSN 5905-00-544-2716
NSN 5950-01-421-6708
NSN 5960-01-328-8248
NSN 6650-00-518-5194
NSN 6220-01-569-0964
NSN 6645-00-181-1877