External 12-Point Metric Flange Bolts are high-strength fasteners made from Class 12.9 alloy steel, offering up to 170,000 psi tensile strength and allowing greater torque during installation thanks to the 12-spline head design.
The smooth, non-serrated flange distributes load evenly and eliminates the need for a washer, while the reduced flange diameter makes them ideal for tight or recessed spaces. These bolts feature a non-indented head for a clean appearance and reduced dirt buildup, and are installed using a standard 12-point wrench.
A black oxide finish offers minimal corrosion resistance and is best suited for dry, indoor environments. Commonly used in heavy equipment, industrial machinery, and other applications where space is limited and strength is critical.
