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 5920-01-537-7784
NSN 5835-00-898-0201
NSN 5960-00-782-7658
NSN 6320-01-103-6218
NSN 5855-00-494-9581
NSN 6220-01-545-3562
NSN 4140-00-234-8524
NSN 6240-00-832-6867
NSN 5999-00-111-4359
NSN 5855-01-138-4985
NSN 6145-01-573-7994
NSN 5975-01-091-3922