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 5920-01-493-5746
NSN 5975-01-147-9196
NSN 2925-00-051-1467
NSN 6110-01-421-2714
NSN 4140-00-566-3896
NSN 6150-01-141-7033
NSN 6220-01-209-6219
NSN 5855-00-185-1560
NSN 6240-01-576-9580
NSN 6645-01-394-0170
NSN 5965-00-296-1634
NSN 5895-01-587-1783