Used to secure plasterboard to drywall and ceiling track systems with a max. of 0.6mm thickness. Phillips No.2 recess for a positive drive Bugle head to reduce likelihood of damaging the board surface 25 super sharp point for ease of penetration 60 twin-thread offers excellent pull-out values and insertion speed Fire Classification: A1" Thread Dia. mm: 3.5 Length mm: 38 Thread Length mm: 33 Head Type: Bugle Recess Type: Phillips Point Type: 25 Sharp Driver Bit Size: PH2 Finish: Dark Grey Phosphate Material: Carbon Steel Max Drilling Thickness mm: 0.6Size 3.5 x 38 - 1000 Pieces Timco Drywall Metal Stud Plasterboard Screws - PH - Bugle - Fine Thread in Grey