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 5990-00-562-8413
NSN 5998-01-625-4480
NSN 5920-00-140-8912
NSN 6645-01-218-9452
NSN 5965-00-522-0922
NSN 5998-01-259-2978
NSN 5935-01-634-0668
NSN 6135-00-553-7995
NSN 6685-00-394-3965
NSN 5990-00-309-0023
NSN 5925-00-464-4675
NSN 5910-01-200-1507