S-90185A732 1/2"-13 x 4 1/2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Excellent corrosion resistance from the zinc-plated steel construction, extending service life in harsh or outdoor environments.
• Secure anti-rotation design with a square neck that locks into materials, preventing spinning during installation and enhancing joint stability.
• Wide, rounded head distributes clamping force effectively, minimizing surface damage and providing a finished appearance.
• Coarse UNC threading with Class 2A fit allows for faster assembly and easier alignment, saving time in construction and industrial projects.
• Grade 5 hardness (Rockwell C25) offers a balance of strength and ductility, suitable for a wide range of structural and machinery uses.
• Full threading along the 4 1/2" length provides versatile fastening depth options for various material thicknesses.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to address common challenges in heavy-duty applications such as construction, agricultural equipment, and industrial machinery. The zinc-plated steel material combats rust and wear, crucial for outdoor or high-moisture environments. Its square neck design ensures the bolt remains fixed during tightening, eliminating rotation that can compromise joint integrity. With UNC coarse threads and Class 2A fit, it facilitates quick, secure installations in wood, metal, and other substrates, reducing labor time while maintaining high tensile strength for load-bearing structures. Ideal for uses where vibration resistance and long-term durability are priorities, this bolt delivers consistent performance under stress.

Specification Summary & Compliance

This carriage bolt features a 1/2"-13 UNC coarse thread with Class 2A fit for standard dimensional accuracy. It meets ASME B18.5 and SAE J429 specifications, ensuring manufacturing consistency and reliability. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use.