Wholsale Silver Zinc Alloy Male Bullet Hinges for Electric Control Distribution Cabinet. Self-Closing Mechanism: Features a complete gate hinge assembly with self-closing spring mechanism for safety compliance. High Load Capacity: Spring housing can hold up to 10kg load while functioning properly. Galvanized Finish: Main body and spring housing are galvanized to BS EN1461: 2009 standard. Ready to Weld: Supplied as a complete set with assembly diagram, screws, washers, and split pins. Material Options: Available for CHS (Circular Hollow Section) or SHS (Square Hollow Section) applications. Fast Lead Time: Standard production lead time is 15 days for wholesale orders. ISO Certified Quality: Holds ISO9001, SGS, and TS16949 certificates with rigorous 4-step inspection. Global Export Experience: 15+ years experience exporting to over 30 countries including US, Canada, and Germany.