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 4140-01-454-0578
NSN 5950-01-223-9021
NSN 6150-01-122-9980
NSN 6110-01-342-1932
NSN 6240-01-406-5345
NSN 5990-01-080-0097
NSN 5915-01-204-8613
NSN 5950-01-514-7348
NSN 2925-01-038-7625
NSN 5925-00-245-3391
NSN 5855-01-184-8089
NSN 6620-01-628-2620