What are the two types of Allen wrenches? Different Types of Hex Keys
What is a security Allen wrench?
This Pin Hex Security Key Wrench is a form of Allen Key to be used with Pin Hex Security Fasteners. Pin Hex fixings are often used in higher torque applications, and find themselves in place of standard socket screws or other standardised fixings.
Is an Allen key a hex key?
A hex key, also known as an Allen key is a simple tool used to drive bolts and screws with hexagonal sockets in their heads. From standard keys in chrome vanadium steel to extra-long with ballpoint heads in chrome molybdenum steel, there are a wide variety to choose from.
What year was the Allen key invented?
The hex key, or at least its means of manufacture, was devised by the Allen Manufacturing Company of Hartford, Connecticut, and patented in 1910.
What size is a number 7 Allen key?
In the United States, larger metric half sizes like 6.5 mm aren't standard in most hex key sets. However, the 1/4″ SAE hex wrench will likely work in place of a 6.5 mm wrench.
MM Substitutes for SAE.
|Metric Hex Key||Imperial Hex Size|