S-90185A736 1/2"-13 x 5" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that prevents spinning during installation and under load
• Enhanced corrosion resistance through zinc-plated steel construction, extending service life in demanding environments
• High tensile strength of 120,000 psi (Grade 5) ensures reliable fastening for heavy-duty structural and construction applications
• Excellent thread engagement with UNC coarse threading and Class 2A fit, facilitating faster assembly and reducing cross-threading risks
• Wide, rounded carriage head provides a larger bearing surface for secure fastening in wood and metal without sinking
• Full threading along the 5" length offers versatile positioning and adjustment capabilities for various material thicknesses
• Compliance with industry standards including ASME B18.5 and environmental regulations (RoHS 3, REACH) for assured quality and safety

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address critical challenges in industrial and construction settings, where vibration resistance and long-term reliability are paramount. The square neck securely locks into materials, preventing rotation during torque application and under dynamic loads, eliminating the need for additional locking mechanisms. Its UNC coarse thread and Class 2A thread fit ensure quick, precise installation in wood, metal framing, and structural assemblies, reducing labor time and potential damage. The zinc plating provides a durable barrier against rust and corrosion, making it ideal for outdoor equipment, agricultural machinery, and infrastructure projects exposed to harsh conditions. With a 120,000 psi tensile strength and Rockwell C25 hardness, it maintains integrity under high stress, offering engineers a dependable solution for heavy-load connections that require consistent performance and compliance with ASME B18.5 standards.

Specification Summary & Compliance

This carriage bolt features precise UNC coarse threading (1/2"-13) with a Class 2A thread fit for standard tolerance and easy assembly. It adheres to ASME B18.5 and SAE J429 specifications, ensuring dimensional accuracy and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safety and sustainability in industrial use.