... ,12.9,etc 4.Material:#1018,#1022 Specification of our screw: 1.NameAll kind of dry wall screws2.StandardDIN, IFI, ISO ... .8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A4494.ThreadUNC, UNF, UNEF, M, BSW ... .8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A4494.ThreadUNC, UNF, UNEF, M, BSW ...