... 3.size:M8-M48 4.grade:8.8,10.9,12. Bolts and nuts:Mechanical Properties1, Material: 40 Cr.2, Tensile ... strength: Mpa quartile 1220 (magnitude 12.9) .3, Tension loading: N quartile 40600 N.4, Adjusting ... and nut package 12.9 10.9 8.8 grade 40Cr 35CrMo 42CrMo construction Track shoe bolts and square hex nuts plow ...