Definition: An often L-shaped tool used for screws and bolts that have hexagonal (6-sided) sockets, an Allen wrench (a hex head wrench) is like a screwdriver but is used for certain types of fasteners such as the set screws used in pinion gears, throttle linkage, or on RC helicopter blades.
You can use either end of an Allen wrench (both are the same size). RC vehicles often come with Allen wrenches to fit the screws used in that particular RC. You can also purchase sets of them, including sets that are fastened together on some kind of ring so you always have the correct size handy. Allen wrenches come in metric and SAE sizes. Some Allen wrenches also come in a straight style with plastic handles much like traditional Philips or flathead screwdrivers, called hex drivers.
- You can use either end of an L-shaped Allen wrench.
- Use the short end in the screw or bolt when you need more torque or power (such as on an especially stubborn screw).
- Use the long end in the screw for those deep, hard to reach or tight spots on the RC.
In need of a good set of Allen wrenches? Compare prices on these RC-sized hex head wrench sets.
Also Known As: hex key | hex head wrench | hex driver