About us We not only produce springs, we also know how to do it... for nearly 100 years. platzmann federn gmbh & co. kg with its headquarters in Hagen, North-Rhine Westphalia, is considered as one of the industry leaders in the field of spring technology. The company is specialized in the production of compression, tension, torsion and flat springs as well as bent wire parts with a wire thickness of 0.08-62 mm made of spring steel wire, stainless alloys and up to 800 degree heat resistant wires.