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 6645-01-416-6267
NSN 6135-01-606-0596
NSN 2925-01-508-4138
NSN 6110-01-414-9786
NSN 5910-00-334-6454
NSN 5915-01-585-8879
NSN 5990-01-133-0351
NSN 5998-01-576-2573
NSN 5965-01-295-9842
NSN 5998-01-093-7847
NSN 5855-00-937-7709
NSN 6320-01-056-1164