UNIT 5 DESIGN OF SCREWS, FASTENERS Design of Screws, …

The thread depicted in Figure 5.1(a) is a square thread. The Vee thread is created by a triangular section while trapezoidal thread has a trapezium section. This thread is also known as the Acme thread. ... diameter, pitch and pitch diameters are described. According to IS : 1362-1962 a screw thread (VEE type) is designated by letter M followed ...

  Thread, According, Trapezoidal, Trapezoidal threads