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 4140-00-179-3977
NSN 6610-01-486-7954
NSN 6105-00-537-5990
NSN 2925-01-012-3162
NSN 6320-01-486-8004
NSN 6150-01-457-9315
NSN 5915-01-490-0244
NSN 6145-01-172-5630
NSN 5990-00-311-1031
NSN 5960-00-902-9039
NSN 6135-00-152-8729
NSN 6220-01-181-3135