Stan dard sae hex key sizes inches metric hex key sizes mm notes compares standard and metric allen wrench sizes where they closely match and where they don t wrench equivalence 27.
Allen key sizes and dimensions for checking accessibility.
S length of short arm max.
If you only own a set of short allen keys consider getting at least the 8 and 10mm sizes in a longer length.
Most allen wrenches have the size stamped clearly on the side of the tiny angled tool.
Horusdy hex key set allen wrench set inch metric 30 piece mm 0 7mm 10mm sae 0 028 3 8 best unique tool gift for men bondhus 20393 l wrench hex key double set multi one size wiha 35393 5 piece mini l key short hex sae set.
Inch series hexagon keys nominal key size f hex width across flats max.
L length of long arm long series max.
Larger allen driver sizes.
These dimensions of allen keys can be used to check the accessibility of your bolts were space is limited.
On the left hand side we have our sae to metric conversion guide for hex keys that provides the best substitute sae allen wrench for each given metric size.
Hex key wikipedia.
R radius of bend min.
C hex width across corners max.
As you ll notice there isn t always a perfect substitute.
Differ ence in 1 1000s of an inch.
The inch or millimeter size may have rubbed off with use or may be entirely too small to read.
A hex key allen wrench or allen key is a simple tool used to drive bolts and screws with hexagonal sockets in their heads.
0 028 0 0280 0 0275 0 0314 0 0300 0 312 0 125 1 312 1 125 2 688 2 500 0 062.
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.
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.
Remember to be wary of the leverage when tightening a bolt.
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.
For instance metric size 9 mm doesn t have an imperial counterpart.
Most manufacturers will publish an allen key size.
