Must conform to mil-std-413
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 5915-01-204-1763
NSN 6685-00-134-2993
NSN 5930-01-508-4255
NSN 5996-00-487-0755
NSN 6110-00-813-2328
NSN 5999-01-590-2771
NSN 6620-00-058-1533
NSN 6135-01-068-0119
NSN 5930-00-203-2080
NSN 6320-01-089-9086
NSN 4140-00-640-1228
NSN 5935-01-111-6463