As you ll notice there isn t always a perfect substitute.
M6 allen key dimensions.
15 73 mm e min 17 77 mm m max.
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.
13 00 mm s min.
Imperial to metric for allen keys.
12 73 mm e min.
Metric socket head cap screws size table.
L length of long arm short series max.
For instance metric size 9 mm doesn t have an imperial counterpart.
All dimensions are in millimeters.
14 38 mm m max.
16 00 mm s min.
S length of short arm max.
L length of long arm long series max.
8 40 mm m min.
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.
Engineering ansi hardware design data engineering metric hardware design data.
In addition to the precision sizes mentioned above the common metric allen wrench sizes are 1 5 mm 2 mm 2 5 mm 3 mm 4 mm 4 5 mm 5 mm 5 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm.
0 7 0 711 0 698 0 798 0 762 8 3 34 28 69 63 1 5 0 08.
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.
S 5mm m6 and s 6mm m8.
C hex width across corners max.
R radius of bend min.
Also a standard size.
Interchangable 0 035 and 0 9mm.
Also a standard size.
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 15 key set.
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.
Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36.
Common metric hex key sizes.
1 25 mm s max.
Allen wrenches are convenient and helpful.
11 05 mm m max.
Interchangable 0 028 and 0 7mm.
9 78 mm e min.
10 00 mm s min.
1 00 mm s max.
1 50 mm s max.
Metric hexagon keys nominal key size f hex width across flats max.
Of these sizes some of the more popular ones are 2 5 mm 3 mm 4 mm 5 mm 6 mm 8 mm 10 mm.
5 2 mm m min.
See norm din 912 iso 4762 the relevant number for the tool head is s given in millimetre.
A hex key or allen key is a simple tool used to drive bolts and screws with hexagonal sockets in their heads.
