bolt and nut 1,high quality ,standard size 2,fast delivery 3,competitive price 4,stainless track shoe bolt 1.material:40Cr, 35CrMo 2.surface:zinc plated,phosphated,black oxide 3.size:M8-M48 4.grade:8.8,10.9,12.9 Mechanical Properties1, Material: 40 Cr.2, Tensile strength: Mpa quartile 1220 (magnitude 12.9) .3, Tension loading: N quartile 40600 N.4, Adjusting quality: HRC34 °- 39 °.In add:But ...