Special bolt is a fastener. It is used in automotive industry, all vehicles, machines and screwing in everywhere. According to quality of the bolts are producing C35, 41Cr4(5140) or 42CrMo4 (4140) materials. The reason of the special, it is produced different measuring than standard bolt. For example; d2 diameter can be large or small according to nominal sizes. It has joiner pin on the bolt head possible. The same as bolt can be different bolt thread(pitch) somewhere different.
