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 6240-01-109-4680
NSN 6110-00-933-0904
NSN 5960-00-971-8432
NSN 5999-01-453-7798
NSN 6110-01-021-6712
NSN 5975-01-487-1335
NSN 5975-01-134-9680
NSN 5855-01-433-2220
NSN 5990-01-517-7848
NSN 5965-01-335-4304
NSN 5998-01-465-2371
NSN 4140-01-434-2424