12th Mar 2026
DIN 7991 Countersunk Socket Screws – Dimensions, Specifications & Applications
What is DIN 7991? DIN 7991 refers to the German industrial standard for countersunk socket head cap screws. They include DIN 7991 CLASS 12.9, DIN 7991 CLASS 10.9 and DIN 7991 A4 These fasteners featur…