特発製作所 Company Profile

We will continue to pursue relentless technological innovation.

Our company was founded in 1938 with the primary purpose of manufacturing springs, and since then, we have upheld the motto "Pursue relentless technological innovation." We are a wire processing manufacturer that produces various types of wire springs (compression coil springs, tension coil springs, torsion springs, custom-made items, etc.), snap rings, retaining rings, and other springs primarily for automotive parts. With over 80 years of accumulated know-how and continuously refined technical skills, we supply products to a wide range of fields, including automobiles, construction machinery, agricultural machinery, general industrial machinery, and bicycles.