... carriage bolt 2.Size: M6-M24 3.Grade:Gr4.8,Gr5.8,Gr6.8,Gr8.8,Gr10.9,Gr12.9 4.Material:Q235,#1035,#1045 ... ,BS, EN, SAE,ASTM3.GradeDIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5 ... ,8; ASTM: 307A,307B,A325,A394,A490,A4494.ThreadUNC, UNF, UNEF ...