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Hair Pins

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About Hair Pins

A hair pin is a fastener made of a springy material, commonly hardened metal wire, resembling the shape of the letter "R". Hair pins are commonly used to secure the ends of round shafts such as axles and clevis pins. The straight leg of the pin is pushed into a hole near one end of the shaft until the semicircular "belly" in the middle of the other, bent leg of the pin grips one side of the shaft resisting any force removing the pin from its hole. To assist insertion the end of the bent leg is angled away from the straight leg. This angled end rides the side of the shaft and opens the "belly" mouth enough to pass the widest part of the shaft as the hair pin is inserted. Hairpins are removable and reusable.

Amateur