Type A - Fixing from the front.
GN 129.3 Hinge, Steel, Zinc Plated, for Flush Fitting Doors
These anti tamper hinges are used for doors which are flush with the frame on the outside. They consist of three parts, and once assembled, they cannot be unhinged.
Using cylinder screws DIN 912, they are easily fixed in place using threads on the user side or by using through screws for different clamping thicknesses.
Steel ST - zinc plated, blue passivated.
Pin - Brass, nickel plated.
Washer - Brass, nickel plated.