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 5990-01-057-4191
NSN 5950-01-227-2466
NSN 5950-01-417-2883
NSN 5895-01-412-0627
NSN 6645-01-436-9702
NSN 5965-00-553-6898
NSN 5975-00-095-3751
NSN 5910-01-381-0369
NSN 5990-01-416-0362
NSN 6645-01-231-9891
NSN 5950-01-065-2288
NSN 6135-01-518-9813