Experts in Manufactured Engineer Studs Since 1971

For over 4 decades, Hague Fasteners have excelled in the quality manufacturing of Engineer Studs.


From small diameter engineer studs for automotive use through large diameter High Pressure Turbine Casing Engineer Studs used in Power Generation facilities all around the World, Hague have the capacity to serve your Special Manufactured Fastener needs.

What is an Engineer Stud ?
There are various key identifiers when it comes to specifying an Engineer Stud. Many international standards exist and Hague can manufacture to the dimensions required under all standards or indeed a bespoke special stud can easily be made to your unique requirements and drawings.


The Metal End is the Stud End that is screwed into the existing component base or body. This is generally 1 or 1.5 times the nominal diameter as specified by purchaser or international standard.
TheNut End is the Stud End which is not screwed into the existing component. A nut is tightened into this shorter threaded end to secure the fixing.
The Plain portion is the part of stud which is not screwed. This shall be greater than 50% of the nominal dia and normally includes thread runouts.
Nominal length- The British Standard BS4439 identifies a range of Nominal lengths from 12mm to 500 mm. The nominal length is the plain portion length & the Nut Threaded End added together.
d – Hague regularly manufacture Engineer Studs in the diameter range M6 (1/4″) through M100 (4″).
Threads Notes
According to the BS4439 standard the threads on the nut end and on the metal end shall be in accordance with BS 3643 parts 1-3. The nut end shall be to the tolerance 6g (medium fit.). This is as normal for a general bolt. The metal end shall be to the tolerance of a close fit (4h) or an oversize tolerance as specified.
The tapped hole shall be to the tolerance 4H or, if it is not critical application a medium 6H tolerance can apply.
Be sure to give the Stud Experts a call with your next Engineer Stud requirements. Hague Fasteners are ready to manufacture for you.