Stud Bolts

Stud Bolts


A fastener is a module, which joins two units mechanically. These components can be used to create a permanent or non-permanent joint, which can be later dismantled or removed. Further, they can be threaded or not, depending on their functions. The components in this range are usually made using stainless, carbon, or alloy steel.

A stud bolt is a component, which has threads on both its ends. They are part of a bolting system and consist of 3 parts. They may additionally have five parts if washers are utilized while fitting them. A few nuts can also be fitted alongside the existing material for hydraulic tensioning within the element. The length of the nut can easily cover the nut with additional 2-3 threads still being exposed. Long studs should not be used as the risk of corrosion due to subsequent exposure increases. This also makes the removal of the fitted nuts more difficult.

What is a stud bolt used for?

These components are produced and availed in different metric and imperial sizes with a wide range of screw thread profiles. They are utilized to form a lock and provide a positive lock preventing it from turning and loosening. This helps in maintaining and preventing fatigue failure within the system.

These components are used in sealants to prevent any leakage due to fluids via porous and tapped material. They are widely seen in walls or partitions. These items play an integral part in frame production, which is produced from timber. They are widely used in non-load-bearing walls as well as firewalls. Studs are also seen on vertical structures carrying loads.

What is difference between bolt and stud?

In the fastening industry, both these components play a crucial role. They both are available in diverse shapes and sizes, which perform different functions within the systems.


  • A bolt is threaded on the exterior and usually utilized for insertion in holes for assembled parts.
  • They are generally tightened utilizing nuts.
  • These components may require external force to be fitted in place.
  • Bolts can be availed in different sizes but are smaller than studs.
  • These fasteners utilize rotational and linear force to give torque readings, which are not accurate.


  • These components are made of a metal rod or shaft which has threads on both its sides.
  • The items in this range have one end connected to the tapering end while the other is connected to the nut and don’t possess a head that requires to be tightened.
  • It doesn’t require any external torque to force it down and can be fastened manually.
  • They are very large in comparison to bolts and can go deeper in the hole.
  • The connectors don’t have rotational force enabling them to give an enhanced reading of torque.


These components are highly diverse and made from a threaded bar. They are utilized to fasten large objects together in different set-ups utilizing nuts at both ends. The elements are also used for providing an adjustable member for various machines and structures.

Why stud is used instead of bolts?

These components allow structures to have accurate values of torque as they don’t twist while tightening like bolts. This provides enhanced clamping force within the system. Further, they are bigger, which enables them to go deeper into holes. The utilization of these modules also reduces the wear increasing, the life-size of the threaded holes.


There are various types of studs, which are categorized based on their threading patterns and designs.

  • Continuous threaded- In this component, the threads are uniform over the entire surface.
  • Tap End- These studs exhibit unequal lengths amongst threads at extreme ends and possess a non-threaded center.
  • Double End- These modules are threaded with similar lengths and possess a threaded center.
  • Double End stub bolt with reduced shank- The elements possess equal threading on the surface at both the ends.  The center cap of these connectors is smaller than the diameter of the stud.
  • Flange- This category of elements is widely used for flange connection having a continuous thread.
  • Welding- These welding elements are used along with a nut on one side which are welded in place for support.

What is UNC stud bolts?

UNC stud bolts are a form of threading that follows the guidelines put forth by the ASME B1.1. These threads are in a symmetrical form having a V-profile. They have an angle of 60 degrees which allows them to be produced and inspected easily.

What does M8 1.25 mean?

M8 1.25 is widely seen in metric fasteners. This infers that M8 1.25 is the coarse threading on the surface of the structure.