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 5855-01-657-7657
NSN 2925-01-345-9439
NSN 5975-01-537-0872
NSN 6610-01-386-4582
NSN 4140-01-583-1766
NSN 6105-00-140-6864
NSN 6105-01-607-6572
NSN 5905-01-432-2851
NSN 5950-01-640-9593
NSN 5915-01-065-9775
NSN 5925-00-081-9135
NSN 5975-01-512-6240