Kingrail Parts, a leading supplier of railway fastening components, announces its comprehensive range of durable coach screws manufactured from high-tensile carbon steel. These essential fasteners are engineered for securely attaching wooden railway sleepers to base plates and rail chairs, providing critical stability and safety in track infrastructure.

Our product line includes two primary types, meeting specific industry standards:

• Available Sizes: 5 ½” (139.7mm) and 6 5/16” (160.34mm), with strict tolerances of ±3.18mm on length.
• Dimensional Integrity: Features a consistent minor diameter (φ 17.46mm) and major diameter (φ 23.8mm) with a robust neck design (φ 25.4mm x 14.29mm) for superior load distribution.
• Square Head Design: Engineered for easy installation with an A/F (Across Flats) top measurement of 16.99mm and bottom of 28.58mm.
• Material & Performance: Constructed from grade BS64, GB 699-88, 45# or 35# carbon steel, ensuring a tensile strength of 550-700 N/mm² and an elongation of 15%.
• Corrosion Protection: Features a long-lasting Hot-Dipped Galvanized (HDG) coating for maximum corrosion resistance in harsh environments.

• Available Size: 6 5/16” (160.34mm), manufactured to the same exacting length tolerance.
• Enhanced Core Diameter: Designed with a larger minor diameter (φ 20.64mm) and major diameter (φ 26.19mm) for applications requiring higher shear strength.
• Compatible Head: Shares the same square head and thickness specifications as AS Coach Screws for tooling compatibility.
• Superior Strength: Made from the same high-quality carbon steel materials, delivering identical high tensile strength, elongation, and HDG surface treatment.

Custom Manufacturing and OEM Services
In addition to our standard AS and M coach screws with embossed head markings, Kingrail Parts specializes in custom fastener manufacturing. We work directly with client specifications and technical drawings to produce tailor-made coach screws for unique project requirements.

• Material: High-Quality Carbon Steel
• Application: Railway Sleeper Fastening, Track Maintenance, Rail Chair Fixing
• Standards: Compliant with industry-specific dimensional and material standards.
• Surface Finish: Hot-Dipped Galvanized (HDG) for Anti-Corrosion.
• Supply: Reliable volume manufacturing for infrastructure projects.

Request a Quote
For detailed technical data sheets, competitive pricing, and more information on our railway fasteners, including custom coach screw solutions, please contact the Kingrail Parts team today.