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

Heavy duty self drilling screws 100mm exterior are designed for fast, 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 partially threaded design improves clamping performance. It pulls materials tightly together, which helps create a strong and reliable fixing when working with thicker 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 100mm 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 consistent performance in urban and industrial conditions.

Key Features

• Self-drilling No.5 point for steel up to 12mm
• Heavy duty self drilling screws 100mm steel for structural fixing
• Partially threaded for improved clamping performance
• Metric thread with V flutes and torque-reducing slash
• No washer – ideal where sealing is not required
• Exterior coating tested to 500 hours salt spray resistance
• Case and core hardened carbon steel construction
• Suitable for steel substrates
• Conforms to BS EN 10666 (DIN 7504)