HT Allen Hex Socket Cap Screw:M3 x 20 - DIN 912/12.9/Black/Full Thread

This M3 x 20 mm screw is a metric standard fastener manufactured from steel with a property class of 12.9, indicating high strength capability. It complies with the DIN 912 standard and features an Allen hex socket cap head for secure driving with a hex key. The black surface finish provides a specific aesthetic and corrosion resistance characteristic suitable for various industrial applications. Buyers select this component when requiring a compact, high-strength connection with full thread coverage that maximizes grip in shorter engagement lengths or thin materials. To choose correctly, verify the M3 nominal diameter fits your mating hole, ensure the 20 mm length allows adequate embedment, and confirm the 12.9 grade meets your structural load requirements.