Evolution BMHH5.5-38-3 Bi-Metal 38mm Tec Screws for Light Section Steel (Box of 200) by Evolution Fasteners

This Evolution BMHH5.5-38-3 Bi-Metal Tec Screw is a 38mm fixing for light section steel. Made with an A2 stainless steel shank for corrosion resistance and a hardened carbon steel tip for drilling power, each box includes 200 screws.

The Tek 3 drill point penetrates steel up to 4.0mm thick without pre-drilling. A 5/16" (8mm) hex head provides secure torque transfer with a flush finish, while the coarse twin thread ensures fast bite and reliable hold. Zinc plating on the threads and tip adds further resistance to rust.

Key facts:

• Stainless steel shank with carbon steel tip
• 5.5mm x 38mm with Tek 3 drill point
• 5/16" (8mm) hex head, coarse thread
• Supplied in boxes of 200

Part of the Evolution Fasteners range, these self-drilling screws are used for cladding, HVAC, light fabrication, and sheet fixing.

Installation info:

Drive with a 5/16" hex driver at 1,500–2,500 RPM. Embed into steel up to 4.0mm thick, maintaining steady pressure for clean seating and secure grip.