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 5990-00-952-6742
NSN 5985-00-552-6177
NSN 5985-01-222-8233
NSN 5975-01-618-6705
NSN 6620-01-227-4380
NSN 6150-00-083-5893
NSN 6645-01-547-0300
NSN 5945-01-308-0671
NSN 5990-01-242-4493
NSN 5935-00-270-1271
NSN 6150-01-434-3959
NSN 5925-01-528-9051