NOT KNOWN FACTS ABOUT TYPES OF SCREW HEADS NAMES

Carriage bolts are utilised wherever the looks on the completed portion is vital, by way of example on carriage exteriors: the bolt is inserted from the surface in the element, with only the smooth head obvious; the sq. area in the shank aligns with a square gap from the aspect, which presents counter-rotation as being the nut is tightened without

The Robertson screwdriver, also called a sq. screwdriver, contains a square-shaped tip. Invented by Peter Lymburner Robertson in copyright, this type of screwdriver is commonly Employed in woodworking and building tasks. It offers outstanding torque transfer and lessened cam-out, rendering it a favorite alternative amid Canadian DIYers and experts.