Abstract: A method of making an anchor bolt with a thread on a section thereof comprising the steps of providing a metal bar (1) of circular or near circular cross-section having a diameter which is substantially equal to the pitch diameter of the thread to be provided thereon, extruding the bar along a selected section (A) thereof to reduce its cross-section, forming a series of lateral protrusions (3) on the selected section of the bar, straightening the bar, and, forming a thread (5) with the said pitch diameter on a further selected section of the bar.