Profile: Monarch Spring & Mfg., Inc. manufactures conical and straight compression springs. Our products include extension, double torsion and mechanical springs. We produce extension springs from .008-to .312-diameter wire. We offer various processes such as shot peening, tumbling and hardening. Our products are made from various materials such as music wire, hard drawn wire, stainless steels, oil tempered, beryllium copper, brass and phosphor bronze.