Hex cap screw Hex Bolt, as the name suggests, is an external screw fastener with a hexagonal head, designed to be turned with a wrench. According to ASME B18.2.1, Hex cap screws have smaller head height and rod length tolerances than ordinary Hex bolts, so ASME B18.2.1 hex screws are suitable for installation in all places where hex bolts can be used. It also includes places where large hex bolts are too large to be used.
The screw head of the hexagonal screw is round outside, and the middle is a concave hexagon, and the hexagonal screw is the kind of hexagonal edge of the screw head that is usually seen. Hexagonal screwdriver looks like '7', with hexagonal steel bar cut in two sections to bend into 90 degrees into a hexagonal screw wrench.
Hex bolts are often used in electrical appliances, power, electrical, electronic, furniture, water conservancy engineering, decoration engineering, mechanical equipment, etc., mainly easy to tighten, disassemble, not easy to slip Angle and other advantages. The Allen wrench is generally a 90° turning, the bend end is long and the side is short, and when the short side is used to play the screw, the long side of the hand can save a lot of force and can better tighten the screw. The long end has a round head (hexagonal cylinder similar to a sphere) and a flat head, and the round head can be easily inclined to disassemble and install some parts that are not convenient to lower the wrench. The manufacturing cost of the outer hexagon is much lower than the inner hexagon, and its advantage is that the screw head (wrench stress position) is thinner than the inner hexagon, and some places are not the inner hexagon can be replaced. In addition, the cost is low, the dynamic strength is small, and the precision requirements are low.