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 6240-01-474-3039
NSN 2925-01-344-0281
NSN 5999-00-751-1188
NSN 5930-00-991-7115
NSN 5996-00-461-3416
NSN 5935-01-463-2200
NSN 5945-01-026-0506
NSN 6240-01-194-2206
NSN 5950-00-932-4260
NSN 6240-01-599-9668
NSN 5999-01-056-6862
NSN 5910-01-198-3914