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 6240-00-145-8167
NSN 5996-00-166-0037
NSN 5998-00-411-1728
NSN 5915-01-313-8364
NSN 6145-00-785-4112
NSN 6685-01-414-1904
NSN 5950-01-034-5435
NSN 5835-00-905-7165
NSN 5985-00-288-6001
NSN 5905-00-192-1883
NSN 6650-00-069-3107
NSN 5930-01-421-3005