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 5975-00-297-3940
NSN 6240-00-269-0980
NSN 6110-00-452-9148
NSN 6645-01-244-4881
NSN 6645-01-651-6119
NSN 6150-00-923-4476
NSN 5930-01-385-9989
NSN 5935-00-258-9168
NSN 5998-01-512-9841
NSN 5985-00-570-0082
NSN 5930-01-603-7060
NSN 6685-01-614-5564