S-90185A728 1/2"-13 x 4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi from Grade 5 steel ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Zinc-plated steel construction provides excellent corrosion resistance, extending the bolt's service life in harsh industrial environments.
• Square neck design prevents rotation during installation and use, offering superior anti-rotation for secure fastening in wood and metal assemblies.
• Fully threaded UNC coarse pattern with Class 2A fit allows for quick, easy installation and strong holding power in various materials.
• Wide rounded head distributes load evenly, minimizing surface damage and enhancing stability in construction and heavy machinery.
• Rockwell C25 hardness ensures high durability and resistance to wear, maintaining integrity under repeated loads.
• Compliance with ASME B18.5, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, ideal for regulated sectors.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. The square neck integrates seamlessly into pre-drilled holes, locking the bolt in place to prevent spinning during torque application—this is crucial for construction and heavy machinery assemblies where stability is paramount. Made from high-strength steel with a UNC coarse thread, it offers superior grip in wood and metal, reducing installation time while ensuring long-term reliability. The zinc plating adds a protective layer against moisture and chemicals, making it suitable for outdoor and industrial settings. By combining robust materials with precise thread fit, this bolt delivers consistent performance in applications like structural framing, equipment manufacturing, and transportation infrastructure, minimizing maintenance needs and downtime.

Specification Summary & Compliance

This carriage bolt features precise dimensions, including a 1/2"-13 UNC thread with Class 2A fit for standard tolerance, ensuring compatibility and ease of use. It meets ASME B18.5 specifications for consistency in manufacturing and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial applications.