Used to secure plasterboard to timber stud work. 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 Coarse thread for extreme hold Fire Classification: A1" Thread Dia. mm: 3.5 Length mm: 32 Thread Length mm: 27 Head Type: Bugle Recess Type: Phillips Point Type: 25 Sharp Driver Bit Size: PH2 Finish: Black Phosphate Material: Carbon Steel Max Drilling Thickness mm: N/ASize 3.5 x 32 - 400 Pieces Timco Drywall Screws - Coarse Thread - PH - Bugle - Black