... screws 1/4*2-1/2 (+3 Cr) 1.standard:ANSI 2.material:35ACr 3.grade:5 4.finishing:+3 Cr ,zinc plating ANSI hex head wood screws 1/4*2-1/2 ... (+3 Cr)1.Metail:Carbon steel,stainless steel,35CrMo,35#.etc.2.Size:1/4-1inch3.Standards:DIN ,ANSI ... /ASME,BS,GB,JIS,Non-standard,JB/T4.Surface:plain,zinc plated,black oxide,hot ...