Timco Heavy Section Self-Drilling Screws – Hex – Exterior – 5.5mm x 55mm – Box of 100

Heavy duty self drilling screws 55mm exterior are designed for fast and secure fixing into heavy section steel without pre-drilling. The No.5 drill point cuts through steel up to 12mm, so installation stays quick and efficient on site.

In addition, the fully threaded design provides consistent grip along the entire length of the screw. This improves holding strength when fixing thicker materials or layered steel sections. The metric thread with V flutes and torque-reducing slash also reduces resistance, so the screw drives smoothly and stays controlled during installation.

These heavy duty self drilling screws 55mm exterior do not include a washer, so they suit applications where sealing is not required. However, they still perform well in external environments. The exterior silver organic coating protects against corrosion and delivers reliable performance in urban and industrial conditions.

• Self-drilling No.5 point for steel up to 12mm
• Fully threaded for consistent grip and holding strength
• Metric thread with V flutes and torque-reducing slash
• Exterior silver organic coating for corrosion resistance
• Case and core hardened carbon steel construction
• Suitable for heavy section steel applications
• Conforms to BS EN 10666 (DIN 7504)