Allen Key Sizes

Allen wrenches are convenient and helpful.

Allen key sizes. Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36. Hex key equivalent sizes. The good news is that just about every tool manufacturer has a range of allen wrench sets you can buy. There are a few ways that you can tell what hex key you may need to finish a project tighten a set of screws or loosen an old screw.

If you aren t sure what size you need an allen wrench size chart can be a handy tool to get you on your way. Less common metric sizes. These dimensions of allen keys can be used to check the accessibility of your bolts were space is limited. Lastly there s one other added benefit to having both sae metric hex keys.

Differ ence in 1 1000s of an inch. The tool is usually formed of a single piece of hexagonal rod of hard steel with blunt ends that are meant to fit snugly into the screw s socket bent in an l shape with unequal arms the tool is usually held and twisted by the long arm creating a large torque at the tip of the. A hex key or allen key is a simple tool used to drive bolts and screws with hexagonal sockets in their heads. In the united states larger metric half sizes like 6 5 mm aren t standard in most hex key sets.

These allen keys or wrenches from wera feature a hex plus head on the short arm and a six sided ball head on the long arm. Hex key size 3 16 1 4 5 16 3 8 3 8 7 16 diameter m16 mio m12 m14 m16 m18 m20 m22 m24 m30 wrench size 7 mm 8mm 10mm 13mm 17mm 19mm 22mm 24mm 27mm 30mm 32mm 36mm 46mm hex key size 3 mm 4mm 5mm 6mm 8mm 10mm 12mm 14mm 14mm 17mm 17mm 19mm 22mm 1 1 1 2 5 8 3 4 3 4 7 8 7 8 1 4 1 2 1 2 2 2 7 8 16 1 4 5 8. Nominal screw sizes m5 and larger have six drilled holes spaced 60 degrees apart unless the purchaser specifies two drilled holes. The m3 and m4 nominal screw sizes have two drilled holes spaced 180 degrees apart.

However the 1 4 sae hex wrench will likely work in place of a 6 5 mm wrench. These sizes are 1 mm 1 25 mm 3 5 mm 4 5 mm 5 5 mm 7 mm. While these metric allen key sizes do exist they rarely appear in your basic allen wrench sets. In that case you ll want a range of allen wrenches to make sure you have the right size for every particular need.

Allen key also known as hex key hexagon key socket key ln key sizes and its dimensions can be very handy while designing and selecting fasteners for your application. These standard allen keys offer a larger range of sizes than the stainless types. Hex plus offers a bigger contact surface in the screw head and so reduces the chance of wear and rounding off the corners in allen head screws. You can find a chart of the allen wrench sizes from any manufacturer.

Their purpose is largely to serve specialized applications where size constraints and strength requirements need to be met.