How many kinds of self tapping screws fastenal have?
How many kinds of self tapping screws fastenal have? What are the categories of self tapping screws fastenal ? It is divided into A-type thread, B-type thread, type AB, if you see it only through the shape of the thread. So what’s the difference between the three? How to distinguish screws A, B, and AB? A thread is self-tapping screws with a pointed tail and has a large pitch; B type is self tapping screws fastenal with a flat tail, they are used in metals. Such as 0. 050 to 0. 200 thickness. AB threads are made of pointed tail screws according to the number of threads of the standard B thread. In addition, it is noteworthy that A thread can be larger than the screw specifications between 0.03 and 0.04, while AB thread can not be larger than the screw specifications. Check the photo, you can see the appearance's difference of different types of self tapping screws fastenal more intuitively. If classified according to materi...