Metric Allen Key Sizes Chart

Hex key equivalent sizes.

Metric allen key sizes chart.

All dimensions are in millimeters. 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. The inch or millimeter size may have rubbed off with use or may be entirely too small to read. However the 1 4 sae hex wrench will likely work in place of a 6 5 mm wrench.

Differ ence in 1 1000s of an inch. 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 15 key set. Hex key size. The good news is that just about every tool manufacturer has a range of allen wrench sets you can buy.

The m3 and m4 nominal screw sizes have two drilled holes spaced 180 degrees apart. In that case you ll want a range of allen wrenches to make sure you have the right size for every particular need. Hex keys are measured across flats af which is the distance between two opposite parallel flat sides of the key. In this case an allen wrench or hex key chart can make finding the right size for your socket head much easier.

Engineering metric hardware design data. Most allen wrenches have the size stamped clearly on the side of the tiny angled tool. 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. Lastly there s one other added benefit to having both sae metric hex keys.

11320 fm 529 rd bldg f houston texas 77041 tel 713 896 1166 fax 713 896 7879 tool size chart inch fasteners metric fasteners wrench sizes in hex key sizes in wrench hex key sizes mm diameter hex heavy hex diameter socket diameter hex socket 1 4 7. Substituting uncommon hex sizes. Common metric hex key sizes. In the united states larger metric half sizes like 6 5 mm aren t standard in most hex key sets.

You can find a chart of the allen wrench sizes from any manufacturer. Shoulder s selection torx drive sizing chart socket cap where can i a hex key gauge the ter proof torx wrench allen keytorx and star socket size chartpatibility table torx technical information eight tool co ltdtorx and star socket size charttorx head sizes 2yamahapatibility table torx technical information eight tool co ltdstainless steel torx head. Tools for hex head bolts and socket heads metric tools for hex head bolts and socket heads diameter 1 4 5 16 3 8 7 16 1 2 9 16 5 8 3 4 7 8 1 1 8 1 1 4 1 3 8 1 1 2 1 3 4 wrench size 7 16 1 2 9 16 5 8 3 4 13 16 15 16 1 1 8 1 5 16 1 1 2 1 11 16 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. Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36.