Answer is:
Helical grooves
Explanation:
A screw thread is formed on a cylindrical surface by cutting Helical grooves on its surface.
Answer is:
Round
Explanation:
The root of ISO metric thread is Round
Answer is:
Saw-tooth thread
Explanation:
In Saw tooth threaded assembly sliding force acts in one direction only.
Answer is:
55 Degree
Explanation:
B.S.F screw threads have the included angle of 55 degree.