M10-1.5 * 20mm Flange Hexagonal Bolt 10.9 Galvanized

An M10×20 mm flanged hex head bolt (property class 10.9, zinc-plated) was used for its high strength, corrosion resistance, and integrated load-spreading flange.

High-strength fasteners—specifically M10×20 mm flanged hex bolts (property class 10.9, zinc-plated)—were selected for their ability to sustain dynamic loads while resisting loosening in vibratory environments.