Hex Screw suppliers Description Hexagon Socket Head Cap Screw has many advantages: 1. It can bear larger loads: it has six force-bearing surfaces, which is more resistant to screwing than flat-head screws and cross-shaped screws with only two surfaces. 2. It can be countersunk in use: that is, the whole nut is sunk into the workpiece, which can keep the surface of the workpiece smooth and beautiful. 3. Easy installation: Compared with the outer hexagon screws, the inner hexagon is suitable for more decoration occasions, especially in narrow occasions. http://www.yuchao-bolts.com/screw/hex-screw/