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Cam out (also cam-out or camming out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. [1] Repeatedly camming out damages the screw, and possibly also the screwdriver, and should normally be avoided.
Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.
Phillips screw head. Henry Frank Phillips (June 4, 1889 – April 13, 1958) was an American businessman from Portland, Oregon. The Phillips-head ("crosshead") screw and screwdriver are named after him. [1] The importance of the crosshead screw design lies in its self-centering property, useful on automated production lines that use powered ...
Combination Robertson/Phillips/slotted fasteners are often used in the electrical trade, particularly for device and circuit breaker terminals, as well as clamp connectors. Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken.
They are usually made of low grade steel, have a slot or Phillips drive, and are used to join sheet metal parts using a hex or square nut. [12] plow bolt: plough bolt: A plow bolt is bolt similar to a carriage bolt, except the head is flat or concave, and the underside of the head is a cone designed to fit in a countersunk recess.
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A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle. This form of the screwdriver has been replaced in many workplaces and homes with a more modern and versatile tool, a power drill, as they are quicker, easier, and can also drill holes.
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