Made of high-quality 304 stainless steel, our product series includes parallel pins, round corner key pins, square keys, parallel keys, woodruff keys and strip pins, covering cross-border common specifications M3/M4/M5/M6. Precision machined with smooth surface, accurate dimension and fine workmanship. It features excellent rust resistance, corrosion resistance and wear resistance, stable in structure and not easy to deform. Perfect for mechanical positioning, transmission connection and limit assembly. Widely used in mechanical equipment, automation parts, motor fittings and cross-border hardware supporting fields. Complete standard specifications in stock, support bulk wholesale and customized non-standard processing.