Hexagon Head - For Heavy Steel 4.0-12.5mm - Self Drilling Screws

Hexagon head screws with self-drilling point for general fastening 

applications to structural steel. Fine thread and TEK 5 point suitable 

for steel thicknesses from 4.0 – 12.5mm. Tough three-stage zinc-ceramic coating for superior corrosion resistance. 

Installation

1. Screws should be installed using a Tek screwdriver or cordless 

drill with adequate power and a drilling speed of between 1500 

– 2500 rpm. (IMPORTANT - Impact screwdrivers will damage 

the threads and must not be used)

2. Use a 5/16" socket to install the screw perpendicularly into the 

steel maintaining steady pressure without forcing the tool. 

3. Stop inserting the screw as soon as the flange makes contact 

with the surface. Overtightening the screw is liable to damage 

the thread particularly in thinner steel.

Product Data

Material: SAE C1022 Carbon Steel

Finish: Zinc ceramic – 500-hour salt spray resistance

Head: 5/16" hexagon washer type

Steel Drilling Thickness: 4.0 – 12.5mm