When a Phillips is not a Phillips Plus So Much More!

Step 33 Exterior Triangle Head

[[br]]Not many tools will work on this tamperproof screw head without damaging it. Uses a driver socket with triangle hole. Simple but so effective.[[br]]

Comments

[Dodgy]

Step 32: Same as those used by the Phillips traffic light controllers. But using an isoceles triangle, recessed. Not equilateral triangle, as shown. Equilateral types are available, and used similarly. Not as screws, but as latches. Requiring a quarter turn (typically), on electrical control boxes & similar.

[LankyDuke]

@ 32 - Exterior Triangle Head

I've seen one similar to this here in Australia on an electrical distribution box at the top of the street (A big green box that hums with the soothing transformer buzz). The only difference was that the triangle was surrounded by a circular well, which leads me to believe that it's actually a locking mechanism, and not a screw, though.