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 6150-00-552-4629
NSN 6685-01-530-2754
NSN 5930-00-020-5132
NSN 2925-00-391-0331
NSN 5855-00-051-2792
NSN 5855-01-512-1926
NSN 5950-01-169-5821
NSN 6610-00-138-8048
NSN 5855-01-655-4035
NSN 5990-01-408-6554
NSN 6240-00-589-4515
NSN 4140-00-448-4306