Countersunk machine screws with metric thread commonly used in pre-drilled and threaded holes. Countersunk head Metric thread" Thread Dia. mm: M4 Length mm: 8 Head Type: Countersunk Recess Type: Pozi Thread Type: Metric Finish: Zinc & Clear Cr3 Material: Carbon SteelSize M4 x 8 - 100 Pieces Timco Metric Threaded Machine Screws - PZ - Countersunk - Zinc in Silver