What is a Hexagon Set Screw?


A hexagon set screw is a versatile, multi-purpose hexagon bolt, ideal for a wide range of applications.


Unlike a hexagon bolt, which is only partially threaded, this screw is fully threaded to the underside of the hex head, giving you greater flexibility.


Also known as


 Hex head set screws, zinc plated bolts, zinc plated sets, high tensile bolts and long bolts.


Why use Hexagon Set Screws?


Hexagon set screws are versatile and long – so you won’t run out of thread length.


They’re ideal for construction, mechanical or electrical engineering, and structural steelwork, particularly when working with thick steel or box sections.


Hexagon Set Screws: How they work


Because they’re fully threaded, hexagon set screws let you fasten securely in a variety of materials and depths. Their design gives you more control over the application, whether you're attaching them with nuts or screwing into pre-tapped holes.


Hexagon Set Screws: Features and specifications



  • Fully threaded up to the head.

  • Made from grade 8.8 high tensile steel, structural grade.

  • Diameters: M4 to M30

  • Lengths: 8mm to 200mm.

  • Zinc plated for corrosion resistance.

  • Manufactured to DIN933 international standard.


Buy your Hexagon Set Screws at Fastco


We stock Unifix Hexagon set screws, with free delivery on orders over £30*. Order now through our website, email us at [email protected] or call us on 01270 252326.


*restrictions apply; please see our delivery page for details.