Firma Killich s.r.o. It offers hexagon head screws with full metric thread according to DIN 933. The DIN 933 range includes stainless steel screws A2, A4, brass, titanium, polyamide steel and galvanized (yellow, white) in strength 5.8, 8.8, 10.9, 12.9. The hexagon bolts (DIN 933) are on a hexagonal wrench.
