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 5920-01-422-0177
NSN 5975-01-634-0678
NSN 5985-00-833-9393
NSN 5990-00-009-1583
NSN 5910-00-400-3135
NSN 6135-01-482-1290
NSN 5910-01-645-3052
NSN 5950-01-509-6293
NSN 7035-01-442-7947
NSN 6150-00-302-6184
NSN 6145-01-446-5421
NSN 6105-00-079-2409