Unless you're the handy practical type, you probably don't handle a screw very often. You can think of a screw as a cylindrical rod with a continuous spiral thread on the outside, and which is used ...

The basic tapping screws are classified as thread forming and thread cutting. Thread-forming tapping screws displace the material adjacent to the pilot hole so it flows around the screw threads.

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Shoulder screws, also known as shoulder bolts and stripper bolts, are machine screws with an integral shoulder or journal between the head and thread. Although they are not readily available in local ...