
High Quality HDG Railway Fastener Rail Track Bolt with Nut Fish Bolt. Elliptic Neck Design: Prevents bolt rotation under vibration, ensuring secure rail joint alignment. High Grade Strength: Available in grades 4.8 to 12.9 for diverse load requirements. Extensive Material Options: Carbon Steel, Stainless Steel, and Duplex Steel available. Multiple Surface Finishes: Zinc, Dacromet, Geomet, and HDG plating options for corrosion resistance. ISO 9001 Certified: Manufacturing process certified to ISO 9001:2015 standards. OEM/ODM Service: Custom screws, bolts, and nuts produced from drawings or samples. Free Standard Samples: Free samples for standard fasteners; new customers cover express cost. Global Experience: Over 35 years experience serving customers in 80+ countries.