Size3.5 * 13, 16, 19, 25, 32, MM 3.9 * 13, 16, 19, 25, 32 MM 4.2 * 13, 16, 19, 25, 32, 38 MM
Features
Corrosion resistance, excellent against gas, weathering and other kinds of corrosive factors including salt water.
Resistant to acid and alkaline attack.
Easy to install, time saving, minimises labor.
Highhardness points and sharp threads for drilling and tapping.
A variety of head colour to suit & blend with roof .
Precise dimension.
Long service life.
Application
Selfdrilling screws have hardened drill points that will drill and thread in structural steel, mild steel, aluminium and wood. These drill points are manufactured in the same method as the high speed steel drill bits. Selfdrilling screws are available in a variety of finishes with unique product features to suit a wide range of environmental conditions.
For the fastening process in steel, they are used on steel frame construction or fastening other materials on steel.
For the fastening process in wood, they are used for applications in wood structures or industrial lightweight constructions, such as roof deck, flooring.
For the fastening process in aluminium, they are used for special industrial applications, construction and manufacturing of windows.
Installation Steps
Choose the proper size of selfdrilling screws.
Put the selfdrilling screw on an electric or cordless drill driver with the proper drive adapter installed.
Drill the selfdrilling screw until the head is flush with the surface of the material.
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