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Your favourite screw head

Arran Cameron

What is your favourite screw head for small machine and self tapping screws? Is it Slotted, Pozidriv, Torx, JIS B 1012, or do you prefer something more exotic like Pentalobe or Tri-Wing?


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    Philips are an old fashioned screw head deliberately designed to cam out when inserted using powered screwdrivers that did not have a torque limiter. They are no longer recommended for new products.


    I have mixed feelings towards hex sockets because they are produced in both metric and imperial sizes (that are almost impossible to tell apart by eye) and they can round off, especially if the wrong size tool is used on them.


    For some reason or other the square Robertson screw heads have never caught on.


    Does anybody know why the JIS B 1012 screw heads are rarely used on products developed outside of the Land of the Rising Sun? I have the correct screwdrivers for these screw heads and prefer them to Pozidriv. The screwdrivers can also be used on both Philips and Pozidriv screws.
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  • 0
    Philips are an old fashioned screw head deliberately designed to cam out when inserted using powered screwdrivers that did not have a torque limiter. They are no longer recommended for new products.


    I have mixed feelings towards hex sockets because they are produced in both metric and imperial sizes (that are almost impossible to tell apart by eye) and they can round off, especially if the wrong size tool is used on them.


    For some reason or other the square Robertson screw heads have never caught on.


    Does anybody know why the JIS B 1012 screw heads are rarely used on products developed outside of the Land of the Rising Sun? I have the correct screwdrivers for these screw heads and prefer them to Pozidriv. The screwdrivers can also be used on both Philips and Pozidriv screws.
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