High Quality Stainless Steel A2-70 Hexagon Head Screws
Hexagon head screws, with the nut, for fastening the two connected
parts with through-hole, is more commonly used bolts. A level and B
level is more important. And in the assembly of high precision, as
well as subject to greater impact, vibration or rate of load
occasions used more. The C-level hexagon head screw for the surface
rough, less demanding assembly accuracy of the occasion.