cutting screw size :m3--m12 material :Carbon Steel, Alloy Steel, Stainless Steel ... or samples. Product rangeBOLTS: hex bolts, heavy hex bolts, hex flange bolts, carrage bolts, wheel bolts, stud boltsNUTS: hex nuts, heavy ... hex nuts, hex flange nuts, nylon insert lock nuts, cap nuts, slotted nuts, rivet ...