Product Name
Square Drive Pan Head Self Drilling Screws
Details Information
Introduction
Compliant with DIN 6921 international standards, this metric hex head flange bolt is engineered for high-stress applications, crafted from premium alloy steel (40Cr/42CrMo) and heat-treated via quenching and tempering to achieve Class 10.9 performance. It delivers a minimum tensile strength of 1040MPa and yield strength of 940MPa, ensuring exceptional load-bearing capacity and resistance to fatigue in dynamic or heavy-duty environments. The integrated hex head flange design acts as a built-in washer, distributing clamping force evenly to prevent surface damage and enhance connection stability, eliminating the need for separate washers.
Features
Black or Plain finish is unfinished (bare steel) has no actual protective coating. There may be an oil residue which provides some shelf life but no real corrosion protection when in use. The term “black” is an old industry term for plain. Depending on the material grade and heat treatment process the colour can vary from a shiny oily finish to a dull black
Applications
Primary use for bolt is on truck cassis frames. The flange eliminates the need for a flat washer and helps compensate for a misaligned hole. When used with a proper class flange nut, the bolt system resists bolt slippage by distributing the clamp load over a wide area.
For use in low-strength applications where resistance to environmental corrosion is a primary concern.
Parameters
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