What Types Of Metric Allen Head Screws Are There?
The head shape of the metric allen head screws are generally a pan head, a countersunk head, a ultra low head, a cup head, a button head, and the like. The cup head metric allen head screws has a flat, chamfered top surface, a smooth or knurled or straight pattern of cylindrical sides and a flat bearing surface. Compared with the usual cup head, the small cup head hex head screw with smaller head thickness is mainly used for small height occasions. The metric countersunk head socket head cap screws have a flat top surface and a conical bearing surface with a countersunk head angle of about 82°/90°/120°. This type of metric allen head screws can be screwed in completely and will not protrude on the surface of the assembled product. The button head socket head cap screws or pan head hexagon socket screws have a low arc top surface and a large flat bearing surface. The hexagon socket step screw is a screw having a cylindrical step under the head...