Long Square Neck Step Carriage Bolt Grade 4.8 5.8 8.8 M14 M16 HDG Round Head

Long Square Neck Step Carriage Bolt Grade 4.8 5.8 8.8 M14 M16 HDG Round Head. Comprehensive Customization: Customized color, shape, and specifications per drawing with 300ppm reject ratio. High Production Capacity: Annual output reaches 400 million fasteners with 24 production lines. Multi-Standard Compliance: Meets DIN, ANSI, GB, JIS, ASME, ISO, BSW, and GOST standards. Diverse Surface Treatments: Offers Hot DIP Galvanizing, Zinc Plated, Dacromet, and Nickel plated options. ISO9001 Certified Quality: Full process quality control with 100% optical screening before shipment. OEM and ODM Services: Accepts custom logos and designs with flexible customization options. Fast Sample Delivery: Standard samples available immediately; custom samples in 15 days after mold ready. Global Logistics Support: Timely delivery from Zhongshan, Shenzhen, and Guangzhou ports worldwide.