M4 x 40 Socket Button (Dome Head) Screws A2 Stainless Steel (304) ISO 7380

Also known as Dome head , a smaller  hexagon  key (Allen)  is required to fit these fasteners which reduces the ultimate tightening torque , designed for applications where a  lower profile and smooth attractive finish is required. Stainless Steel A2 (304)

Product Details

• M4.0 x 0.70mm Pitch

• Coarse Thread

• 2.50mm  Allen Key Size

• Longer lengths are not fully threaded