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 4140-01-596-6832
NSN 6240-00-242-6231
NSN 6220-00-468-5801
NSN 6685-01-315-1860
NSN 5998-00-585-0083
NSN 6645-01-090-8875
NSN 5965-00-843-9957
NSN 5965-00-583-4865
NSN 6135-00-563-7711
NSN 7035-01-081-8017
NSN 6240-00-797-9700
NSN 5960-00-405-4608