... : 3.5x13----4.8x152 3.Grade:Gr.8.8,10.9,12.9,etc 4.Material:#1018,#1022 Specification of our screw: 1 ... .4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325 ... .4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325 ...