Toolcraft Machine Screws Cheese head countersunk screws 620594 - Toolcraft TO-5430966, Toolcraft produces the TO-5430966 Cheese head countersunk screws, made of steel and zinc galvanised for enhanced durability. These Phillips M4 screws are 16 mm in length and are supplied in packs of 200 pieces. They are typically used in assembly and construction where a flush finish is required. Toolcraft TO-5430966 Cheese Head Countersunk Screws M4 16mm 200 pcs