... ,4.00mm, 4.80mm, 5.00mm, 6.00mm, 6.25mm, 7.00mm, 8.00mm, 9.00mm, 10.00mm, 12.00mm3)Type of Surface: Helix(screw), Plain ... as civil engineering construction of large scale railroad, highway,etc.8)Inquiry please provide: Standard(year), Diameter, Mechanical property(especially tensile ...