Screw fasteners are the most widely used hardware general-purpose parts. They have already integrated all aspects of human production and life, and have become one of the guarantee conditions for human modern production ...
We know that the self-tapping screw is a hole that does not need to be tapped. Unlike the mechanical screw, when the mechanical screw is used, it is necessary to drill a hole in the product workpiece, and then directly r...
The head angle of the countersunk head screw is not a fixed value and needs to be distinguished according to the grade. 100° and 130° are often encountered in aerospace components, and 90°, 110° and 120° are commonly use...
One feature of the one-way safety screw is that it has an unconventional groove type. If there is no matching screwdriver, it is difficult to tamper with the screw. One method is to fix the material with screws to preven...
The bolt threads are generally cold worked so that the thread blanks within a certain diameter range pass through the twisting plate and the threads are formed by the pressure of the wire. The plastic flow line of the th...
1.Spheroidizing (softening.annealed countersunk screws. When the hexagonal cylinder head bolts are produced by the cold heading process, the original structure of the steel directly affects the forming ability during col...
