HEX BOLTS & SCREWS

Hex head bolts and setscrews are a primary method of fastening used across construction and engineering.

While they look similar, the primary difference is their threading: Setscrews (DIN 933) are fully threaded to the head, making them ideal for pre-tapped holes.

Hex Bolts (DIN 931) however have a partially threaded shank that provides a smooth bearing surface for high-vibration assemblies. 

Popular Materials and Standards

  • High Tensile Steel: The standard for structural and automotive work, typically finished in Bright Zinc Plating (BZP) for indoor corrosion resistance or Galvanised for use outdoors. Available in various tensile strengths.
  • A2 Stainless Steel (304): Best for general outdoor and architectural use due to its rust resistance.
  • A4 Marine Grade Stainless Steel (316): Essential for saltwater, chemical, or pool environments to prevent pitting and staining.
  • Brass: Essential for applications where corrosion resistance, electrical conductivity, or a decorative finish is required. Because brass is a non-magnetic alloy, these fasteners are frequently used in marine environments, electrical installations, and heritage restoration projects.
HEX BOLTS & SCREWS
CARBON STEEL

CARBON STEEL
STAINLESS STEEL

STAINLESS STEEL
BRASS

BRASS
NYLON

NYLON