Fastener manufacturing is the reflection of material composition, organization, manufacturing processes and other factors. The future development of fastener manufacturing trends can be summarized as high, small, fine, deep. High means better anti-corrosion; small means fastener upsetting process more refined; fine is the fastener surface to the final use of finishing; deep means the surface treatment should do strengthen and better anti-corrosion to bear the high load and have a longer service life. To be able to ensure that the connection strength, stress, temperature, environmental conditions, fastener also need to adapt to the installation operation, installation of space constraints, which is the fastener technology innovation.
