Reed Rolled Thread Die Co. cylindrical die thread rolling machines ; thread rolling processing machines ; form and thread rolling dies ; thread rolling attachments ; knurls for automatic screw ...

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 ...

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 ...