... .material:mild steel,45#steel,40Cr steel 2.surface:zp,black,hot dip.. 3.size:M8-M48 4.grade:4.8,8 ... pitch: 1.56mm, 2.0mm, 3.0mmFinishing: zinc plated, phosphated, black Oxide...Outer packing: standard neutral carton box fastened with palletSatisfactory ...