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 4140-00-580-8508
NSN 5930-01-442-4757
NSN 5925-00-246-4645
NSN 4140-00-106-6780
NSN 6145-01-010-1896
NSN 5950-01-240-3031
NSN 5925-01-194-7790
NSN 5895-00-153-0086
NSN 5950-01-407-3766
NSN 4140-01-478-3897
NSN 6135-01-286-9563
NSN 6620-01-360-4725