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 5975-01-139-6797
NSN 5960-01-364-1318
NSN 6110-01-303-0839
NSN 5990-01-433-3786
NSN 6110-01-655-7400
NSN 6220-00-099-9192
NSN 5930-00-962-9514
NSN 6145-01-152-9462
NSN 5998-00-488-7406
NSN 5996-01-383-9308
NSN 4140-01-195-7618
NSN 5998-01-216-8785