Timco Fine Thread Drywall Screws are great at securing sheets. Used to secure plasterboard to wall/ceiling track systems with a max of 0.6mm thickness. CE Standard WebBS EN 14566:2008. Corrosion Rating 1 - Clean, dry & low humidity environments. Driver Bit Size: PH2. Finish: Black Phosphate. Head Type: Bugle. Length (inch): 2. Length (mm): 50. Material: Carbon Steel. Max Drilling Thickness (mm): 0.6. Pack Dimensions L x W x H (mm): 265 x 152 x 50. Pack Weight (kg): 0.550. Point Type: 25° Sharp. Product Code: 00050DRYB. Recess Type: Phillips. Size (mm): 3.5 x 50. Substrates: Softwood, Thin Sheet Metal, Drywall. Thread Dia. (mm): 3.5. Thread Length (mm): 45. Thread Type: Fine.