Product Name
Square Drive Pan Head Self Drilling Screws
Details Information
Introduction
A one-piece hex washer head bolt with a flat bearing surface, made ofmedium carbon or high-alloy steel.
Our Metric Hardened Fine Thread Hex Head Flange Bolt, conforming to DIN 6921 standards and rated Class 10.9, is a high-performance industrial fastener engineered for heavy-duty applications. Crafted from premium carbon steel, it undergoes rigorous hardening treatment to achieve exceptional tensile strength (1000MPa minimum) and yield strength (900MPa minimum), making it ideal for high-load scenarios in machinery, automotive, and construction industries.
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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