Hexagon head screws conforming to the norm EN ISO 4014 and DIN 931 are a widely used type of threaded fasteners. These bolts feature a six-sided socket, which allows for firm tightening using a six-point wrench. They https://isaiahobhr332930.aboutyoublog.com/35416638/hexagon-head-bolts-en-iso-4014-din-931