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The hole, which is six sided, is actually in the head of the Allen screw or bolt, NOT in the wrench. The Allen wrench is a six sided tool steel bar made to very precise measurements and often, but not always, bent at a right angle at one end. Professional Allen wrenches almost always have a large 'T' handle to use as a grip, and are about 7-9 inches long, as opposed to the smaller ones you find in hardware stores. The Allen wrench principle is to allow more torque on the screw or bolt. Many mechanics even have an entire set of Allen bits to fit on their torque wrench.

Variations on the well known Allen head, (which has been around since 1912) are the modern Torx screw and the Bristol screw (much used in British aircraft industry) - All of these have a similar shape and a common principle of allowing more torque to be applied, and avoiding what is called 'cam out'.

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Related Questions

What should I do if the allen wrench hole is stripped?

If the allen wrench hole is stripped, you can try using a rubber band or a piece of steel wool to fill the hole and then insert the allen wrench. If that doesn't work, you may need to use a screw extractor tool to remove the stripped screw.


What geometrical shape forms the hole in an Allen wrench?

hexagon


What geometrical shape forms that hole that fits an Allen wrench?

Hexagon


What geometral shape forms a hole that fits an Allen wrench?

a hexagon


What size rounded allen wrench do I need for this task?

To determine the size of the rounded Allen wrench needed for the task, measure the diameter of the screw head or the hole it fits into. Match this measurement to the corresponding Allen wrench size.


Q What geometrical shape forms the hole that fits and Allen wrench?

hexagon


What shape forms the hole that fits an Allen wrench?

Allen keys are hexagonal. The shape is a hexagon (6 sided figure).


What geometrical shape forms the hole that fits an Allen wrench?

Hexagon


What is Another name for an Allen wrench?

An allen wrench is sometimes referred to as a hex wrench or hex key.


How do you get the key to turn in the ignition switch?

If you look by the shifter console there is a little cap or lid remove this and inside the hole is a little flange, either use a screwdriver or Allen wrench and push down on it. This will allow the key to turn. I acually leave the Allen wrench in the hole because sometimes it will act up. hope this helps


What size Allen wrench for 2002 escape front caliper?

7mm Allen wrench


What is a Allen Wrench used for?

Allen Screws.