Self-tapping screws are also one of the most important tools at home as well as in metalwork. These distinctive ...

Self-tapping screws are usually drilled into pre-made holes (pilot holes) in metals, such as zinc, aluminum, and bronze and its alloys, as well as plastics and resin-impregnated plywood. They create ...

Walter has expanded the range of its Thread·tec Omni TD117 Advance blind-hole tap and Thread·tec Omni TD217 Advance through-hole tap. The new additions to the TD117 Advance blin ...

Twist drills do not make accurately sized or good finish holes; a reamer of some type is often used to cut the final size and finish. A reamer will not make the original hole; it will only enlarge a ...

The strength of some internal threads is more sensitive to tap diameter than previously thought. • Cold-formed threads are no stronger than cut threads when holes are correctly sized. • Cut threads ...