What Are the Size Specifications of Hex Key Wrenches?
2 Answers
Hex key wrench specifications include 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 17mm, 19mm, 22mm, 24mm, 27mm, etc. Here is some information about hex key wrenches: 1. A hex key wrench is a tool used to drive bolts and screws with internal hexagonal heads. Common English names include "Allen-key" and "Hex-key". Hex key wrenches are also known as Allen wrenches. 2. The size of a hex key wrench refers to the distance between two parallel faces. For example, an 8mm specification means the distance between the corresponding two sides is 8mm.
I often use hex keys when working on my car, with sizes measured in metric millimeters, ranging from the smallest 1.5mm up to 10mm. Common sizes for car repairs include 2mm, 3mm, 4mm, 5mm, and 6mm. Each size has its purpose: for example, 3mm is used for adjusting seat rails, while 5mm is for securing engine component screws. Using the wrong size, such as a larger key on a small screw, can lead to stripping or damaging the bolt head, compromising the part's stability. I recommend beginners get a complete set of hex keys, covering sizes from 1.5mm to 10mm, to avoid confusion during repairs. Smaller sizes like 1.5mm are ideal for delicate tasks like installing electronic panels, while larger sizes like 8mm are suited for chassis connections. When purchasing, pay attention to material hardness—softer materials can deform easily, reducing efficiency.
