11 March 2017

Difference between set screw and cap screw

What is set screw?

A type of screw that is normally used to secure an object within or against another object without using a nut is called a set screw. Example: Secure a pulley or gear to a shaft. 

What is cap screw?

A cap screw is a type of screw with a cylindrical head and hexagonal drive hole is also known as a socket head cap screw. 

Let us have a deep insight into the difference between set and cap screw. 

Difference :  

  • Setscrews are subjected to compressive force only while cap screw is subjected to tensile and shear forces also.
  • Setscrew transmits force from threaded components to the other mating component by means of screw point but in case of a cap screw, the force transmitted only by the head.
  • Setscrews are short and threaded over the full length of the shank as compared to cap screw.