The threads of the screw as the threads are turned by the screwdriver .
the minor diameter should fall between 4.917mm - 5.153mm
Taps and dies are used to thread . A tap threads a hole and a die threads a rod.
reducing friction along screw threads is an example of mechanical efficiency. if theres no friction mechanical efficiency would be at 100%
the easiest way is to drill it out. drill a hole thru center of broken bolt, make sure it is smaller then the diameter of the bolt. after drilling use a easy out to remove the threads of the bolt. check that the threads in the head are ok! then put in new bolt.
1/16 less than the diameter of screw, or the same diameter as the barrel (the part inside the threads)
Thread series cover designations of diameter/pitchcombinations that are measured by the number of threads per inch (TPI) applied to a single diameter
M24 represents the outside diameter(O.D.) of the threads and the 2 represents the pitch of the threads(the distance between each thread).
Pipe threads are stated in terms of so many threads per inch. For instance, a bolt designated as 1/4-20 is a 1/4 inch diameter bolt with 20 threads per inch. Divide one inch by 20 to find the pitch distance.
The major diameter is the diameter of the crest of the thread. Use a Vernier gage and mesure the diameter of the crest points of contact ( maximum external thread diameter). Unified National thread series defines the expected major diamter and tolerance. For internal threads ( nuts) the major diameter is the diameter of the roots of the thread.
§ Screw threads have better compression strength than other threads. § Due to low thread angle there is no radial pressure on nut. § Due to smaller angle, the lead of screw is less.