S-90185A155 5/8"-11 x 6" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that securely locks into materials, preventing loosening under vibration and heavy loads.
• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Corrosion-resistant black-oxide steel finish provides durable protection against rust and wear, extending service life in harsh environments.
• Wide rounded head design distributes clamping force evenly, minimizing surface damage and improving load-bearing capacity.
• Fully threaded coarse UNC thread allows for quick installation and strong grip in wood, metal, and construction materials.
• Grade 5 hardness (Rockwell C25) offers excellent durability and resistance to deformation under high stress conditions.
• Compliance with ASME B18.5 and SAE J429 standards guarantees consistent quality, interchangeability, and reliability in industrial use.

Professional Applications & Engineering Value

This 5/8"-11 UNC carriage bolt is engineered to address common challenges in heavy-duty industrial and construction applications, such as structural framing, machinery assembly, and transportation equipment. The black-oxide steel material and Grade 5 strength provide robust resistance to corrosion and high tensile stresses, ensuring long-term integrity in outdoor or high-moisture environments. The square neck and wide rounded head work together to prevent rotation during tightening, reducing installation time and maintenance needs. With fully threaded coarse threads, it offers superior holding power in wood and metal substrates, making it ideal for securing beams, trailers, and agricultural machinery where vibration resistance and durability are critical.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.625", ensuring accurate engagement and ease of assembly. It conforms to ASME B18.5 and SAE J429 specifications for dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe usage in global markets.