With the Spax Spax-M mdf screw, you join engineered boards such as mdf and chipboard quickly without splitting or surface bulging. The specialized cut point cuts through dense fibers, making pre-drilling usually unnecessary even when driving close to board edges. Its partial thread pulls the wooden components tightly together without gaps, while the small countersunk milling head sinks neatly flush into the material for a smooth finish. The t-star plus T20 drive ensures dependable bit grip without slipping or cam-out. Finished with a corrosion-resistant wirox coating, this 4 x 40 mm steel screw delivers durable and accurate fastening for cabinetry, furniture building, and interior joinery.