Before placing the hex key into the bolt make sure the head is clean of dirt and debris.
M6 allen key bolt dimensions.
If all else fails you may want to use our drill size conversion table or our tap drill size calculator the information available from our sources is usually sufficient for all computer related drill or screw requirements world wide.
Imperial to metric for allen keys.
All dimensions are given in millimeters.
Metric hex nut dimensions calculator.
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 16 1 1 16 m3 5 50 2 50.
The m3 and m4 nominal screw sizes have two drilled holes spaced 180 degrees apart.
Refer the following table for metric allen key sizes and dimensions for corresponding socket head cap screw based on iso 4762 din 912 standards.
For example for an m8 socket head cap screw we need at least 32 8 head size 40mm clearance above the screw for easy accessibility.
The smaller size of allen wrench can easily strip a hex bolt or be stripped down itself.
Dimensional table of allen din 912 bolt.
Less common metric sizes.
This chart contains information on number metric and fractional number socket head cap screws along with tap drill information.
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.
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.
For instance metric size 9 mm doesn t have an imperial counterpart.
Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36.
As you ll notice there isn t always a perfect substitute.
Nut dimensions inch and metric reference.
All dimensions are in millimeters.
Engineering metric hardware design data.
Their purpose is largely to serve specialized applications where size constraints and strength requirements need to be met.
Iso 4032 1999 hexagon regular nuts style 1 product grades a and b.