M10 x 25mm Socket Head Cap Screw5.5mm socket head for 5.5mm Allen key. Also works well as a drill bit for inserting 5.5mm headed self-drill screws. Description M10 x 25mm Socket Head Cap Screw5.5mm socket head for 5.5mm Allen key. Also works well as a drill bit for inserting 5.5mm headed self-drill screws. Reviews & Ratings No reviews have been written yet, be the first. Write a Review