JIS B5012 Color Coded Rectangular Wire Die Spring Mold Spring for Industrial Load Classification

Our full-series color-coded die springs comply with JIS B5012 Japanese standard. Rectangular flat wire structure provides higher bearing capacity than ordinary round wire springs.

We classify loads by color: yellow (extra light), blue (light), red (medium), green (heavy), brown (extra heavy). Two material choices are available: cost-effective 65Mn for regular use and premium 50CrVA for high-temperature, high-cycle working conditions.

All springs go through vacuum heat treatment, shot peening and presetting processes to minimize permanent deformation and extend service life. The electrophoresis finish brings uniform color and reliable rust resistance.

✅ Features

• JIS B5012 standard, color marking for quick load selection
• Rectangular flat wire design
• Ground closed ends for good verticality
• Low permanent set, excellent fatigue resistance
• Massive standard inventory for fast delivery
• Custom dimension, stiffness and surface treatment supported
• One-stop supply: assembly kits with caps, bolts, washers and nuts

✅ Applications

Widely used in plastic injection molds, stamping dies, die-casting molds, jigs, fixtures and automation machinery.

✅ About Us

Dongguan Yuanbang Spring is a professional spring manufacturer located in Humen, Dongguan. ISO & CE certified. We accept small trial orders and bulk orders, and can provide material certificates and test reports for your import inspection.