Key Set Metric
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Key Set Metric
What are the difference between Imperial and Metric Allen keys?
One difference is the units (mm/inches).
Are there any difference in the structures of these key eg:
can I find these exact key's in an Allen Key metric set?
1/4” Allen Wrench
1/8” Allen Wrench
5/64” Allen Wrench
.050” Allen Wrench
3/16” Allen Wrench
Thank you.
You need both Metric and Imperial. In the U.S., Imperial numbers are used, as in 1/4", but everywhere else uses the metric system, e.g., 5 mm. A lot of products made in America, or for Americans, use Imperial designations, but anything made overseas usually has metric hardware. The keys are constructed the same, just to different specifications. It really is a good idea to have both around the home or shop because you never know what type you will need. If an Allen key isn't an exact fit, especially for the smaller sizes, you are running the risk of stripping the screw head or rounding the corners of the key. Don't try to make one standard fit another because set screws and other types of fasteners can be really hard and almost impossible to drill out if stripped. Just buy a combo kit of both types for around 10 or 12 dollars at any hardware store or home center.
That is why a lot of companies, especially those in the electronics industry have switched to Torx or star fasteners. They don't strip nearly as easily, especially in the tiny sizes found on small electronic devices.
Metric - Stadium Love