Often known as pig nose or twin hole, this screw head has two round holes which have been reverse each other and resemble a pig’s nose. It is a protection-style screw to avoid tampering. You will want a Unique spanner screwdriver for this type of screw head.Usually may be recognized by their blue hue. They’re screwed into pilot holes inside the
Nevertheless they may also be used to preserve bookbinding jobs and enormous manuals alongside one another too, that's why the identify.These screws are utilized for assembling fiberboard home furniture such as bookshelves. Having said that, these want to be used following drilling a pilot hole.Self-tapping screws lessen the need to have for pre-dr
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