| 31. | Then fold each end of the sticky tape up around the screw head and press these ends against the screwdriver blade.
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| 32. | Strictly speaking, the bearing area refers to the area of the screw head that directly bears on the part being fastened.
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| 33. | Spanners for Whitworth bolts are marked with the size of the bolt, not the distance across the flats of the screw head.
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| 34. | _When removing screws, you will inevitably run into a different type of screw head requiring, say, a seven-sided carbon steel driver bit.
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| 35. | If you use solid brass screws, you don't have to countersink them; the exposed screw heads become part of the bookcase's design.
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| 36. | Compatible screw heads are usually identifiable by a single depressed dot or an " X " to one side of the cross slot.
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| 37. | I suggest your son have the plasterboard seams taped and covered with joint compound ( also covering the nail or screw heads ).
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| 38. | This approach creates a set of graduated slotted screwdrivers that fit a particular screw for a tighter engagement and reduce screw head deformation.
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| 39. | Can someone say what type of screw head socket ( or bolt head socket ) is most resistant to rounding-preferable from personal experience?
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| 40. | This feature can be identified as a small screw head on the barrel bridge with the word " patent " next to it.
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