... -M6 D=2-4mm Slotted Camera Screws MOQ:10K Slotted Screws for Camera:A.Product specifications Slotted Screws for Camera Size Norminal diameter: 1/4 ... A286,35#,40CR,35CRMO,SCM435,and etc. Slotted Camera Screws Surface treatment Plain, Black Oxide,nickel plated, Chromated, passivated, zinc plating, phosphated ...