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 5855-01-445-6551
NSN 5975-01-461-3542
NSN 5915-00-244-1702
NSN 6220-00-595-6954
NSN 6620-00-106-9658
NSN 6645-01-366-5033
NSN 5910-01-418-0991
NSN 5895-00-462-9157
NSN 6650-01-205-5313
NSN 5925-00-592-0881
NSN 4140-01-419-0198
NSN 4140-01-516-2939