- Joints and couplings (1)
- Couplings, shaft: rigid, flexible, universal joint, etc. (2)
- Joints, swivel and universal, except aircraft and auto (1)
- Drives, chains, and sprockets (2)
- Belting, chain (1)
- Clutches, except vehicular (1)
- Pulleys, power transmission (1)
- Shafts, flexible (1)
