Hand tools and the fasteners they turn: selection, cleaning and storage, and identifying a bolt or a screw by size, thread pitch and grade marking before it is replaced.
Common failure modes
- Tools put away wet, which corrodes them
- A driver that nearly fits, which rounds the head
- A fastener replaced with one of a lower grade
- A handle that has loosened and was used anyway
- A thread pitch assumed rather than measured
Procedures
Where this stops
Repair of a damaged tool is usually not economic, and a page will say so. A torque value is always taken from the equipment documentation, never from this site.