S-90185A250 1/2"-13 x 8" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that locks securely into materials, preventing spinning during installation and use.
• Exceptional tensile strength of 120,000 psi ensures reliable load-bearing capacity in demanding applications, reducing the risk of fastener failure.
• Enhanced corrosion resistance from zinc plating, extending service life in various environmental conditions and reducing maintenance needs.
• Optimized for quick and secure installation with fully threaded UNC coarse threads and Class 3A fit, providing consistent engagement and vibration resistance.
• Wide rounded carriage head design distributes clamping force evenly, minimizing surface damage and improving aesthetic finish.
• High hardness (Rockwell C25) offers excellent wear resistance, maintaining structural integrity under repetitive stress.
• Compliance with industry standards including ASME B18.5, RoHS 3, and REACH, ensuring safety, reliability, and environmental responsibility.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial challenges such as joint loosening and material degradation. The square neck integrates seamlessly into wood or metal, providing a non-rotational feature that is critical in construction and heavy machinery assemblies. Its UNC coarse thread pattern ensures rapid installation and high resistance to vibrational loosening, making it ideal for structural frameworks and equipment mounting. The zinc plating offers a protective barrier against rust, essential for outdoor or high-moisture environments. With a tensile strength of 120,000 psi, it supports high-stress applications in industrial fastening, reducing downtime and maintenance costs while adhering to strict ASME B18.5 specifications for consistent performance.

Specification Summary & Compliance

This carriage bolt features precise Class 3A thread fit and UNC coarse threading (1/2"-13) for accurate engagement. Manufactured to meet ASME B18.5 standards, it ensures dimensional consistency and reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial use.