Metric socket flat head, Class 12.9 alloy steel black oxide finish, Coarse (standard) thread
Socket flat head screw

Socket flat head diameter is measured on the outside of the threads.

Metric socket flat head diameter

Metric socket flat head, Class 12.9 alloy steel black oxide finish, Coarse (standard) thread

Diameter and Thread pitch

3mm x 0.5mm 4mm x 0.7mm 5mm x 0.8mm 6mm x 1.0mm 8mm x 1.25mm 10mm x 1.5mm 12mm x 1.75mm 14mm x 2.0mm 16mm x 2.0mm