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 4140-00-830-9515
NSN 6145-00-232-0813
NSN 5950-01-451-3518
NSN 5950-01-090-0895
NSN 5985-01-644-8419
NSN 5895-01-322-8268
NSN 6620-00-167-0963
NSN 5990-00-932-3070
NSN 6650-01-442-2596
NSN 5999-00-951-4081
NSN 5975-01-365-2180
NSN 5975-01-429-8609