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 6650-00-161-4122
NSN 6320-00-149-7570
NSN 5935-01-081-5622
NSN 6240-01-455-5638
NSN 5935-00-455-0417
NSN 6110-01-168-7711
NSN 6145-01-491-7530
NSN 6240-01-381-6815
NSN 4140-01-218-3391
NSN 5895-01-419-1483
NSN 5950-01-514-8430
NSN 6620-01-430-7104