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 4140-00-925-9218
NSN 5855-01-083-6916
NSN 5930-01-502-9074
NSN 6135-01-515-9626
NSN 6135-01-412-0097
NSN 5996-01-657-1447
NSN 6650-01-437-8852
NSN 6145-01-200-7936
NSN 6645-01-590-5534
NSN 5925-01-237-1044
NSN 5960-01-515-4791
NSN 5935-01-225-8698