
OEM High Strength Hex Bolts Customized Special-Shaped Parts Black Surface Treatment. Customized Special-Shaped Parts: Available in sizes M1.6-M52 and lengths 6mm-350mm based on drawings. High Strength Stainless Steel: Materials include SS304, SS316, A2-70, A4-80, B8, and B8m grades. Free Sample Availability: Free samples provided if in stock, buyer covers air shipping cost. Fast Delivery Time: Sample orders ship in 5-7 days; container orders in 15-20 days. Wide Application Range: Suitable for machinery, chemical industry, environmental, and building sectors. Multiple Standard Compliance: Meets DIN, ANSI, and GB standards for global compatibility. Professional OEM/ODM Service: Customized fasteners designed and manufactured per buyer specifications. Competitive Factory Pricing: Direct supply with competitive prices and 20 years of industry experience.