S-93548A804 5/8"-11 x 2 1/2" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance thanks to the integrated square neck design, ensuring the bolt stays securely in place during assembly and under vibration.
• Enhanced corrosion resistance provided by the zinc-plated steel construction, extending the bolt's service life in various environmental conditions.
• High tensile strength of 60,000 PSI and Rockwell B70 hardness for reliable performance in demanding, heavy-duty applications.
• Easy and quick installation with coarse UNC threading and a fully threaded design, allowing for faster driving and secure fastening.
• Wide, rounded carriage head distributes load effectively and provides a finished appearance while reducing surface damage.
• Compliance with major industry standards including ASTM A307, SAE J429, and ASME B18.5, ensuring consistent quality and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This Grade 2 zinc-plated steel carriage bolt is engineered to address common challenges in structural and heavy machinery applications where vibration loosening and corrosion are primary concerns. The square neck design locks securely into materials, preventing rotation during nut tightening and under dynamic loads, which is critical in wood-to-metal connections and construction frameworks. The coarse 5/8"-11 UNC thread ensures rapid assembly and strong holding power in softwoods or composite materials, while the zinc plating offers a protective barrier against rust, making it suitable for outdoor or humid environments. Its 60,000 PSI tensile strength and compliance with ASTM A307 provide assurance for load-bearing uses in industrial and agricultural equipment, ensuring long-term reliability and safety.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.625" and a length of 2-1/2". It is manufactured in accordance with ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming adherence to environmental and safety regulations.