S-93548A739 1/2"-13 x 7 1/2" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that locks securely into materials, preventing the bolt from turning during installation and under load.
• Enhanced corrosion resistance provided by the zinc-plated steel finish, extending service life in demanding industrial and construction environments.
• High tensile strength and durability with a Grade 2 rating and 60,000 PSI tensile strength, ensuring reliable performance in heavy-duty applications.
• Secure coarse threading using 1/2"-13 UNC threads and Class 2A fit for easier, faster assembly and robust holding power.
• Optimized load distribution from the wide, rounded carriage head, which minimizes surface damage and provides a clean, finished appearance.
• Versatile partial threading allowing for effective clamping over long spans, ideal for wood-to-metal and structural connections.
• Consistent quality and reliability backed by compliance with ASTM A307, SAE J429, and ASME B18.5 standards, ensuring interchangeability and safety.

Professional Applications & Engineering Value

This zinc-plated steel carriage bolt is engineered to address common challenges in construction, manufacturing, and industrial assembly, where vibration resistance, corrosion protection, and structural integrity are critical. The square neck design effectively counters rotation, eliminating the need for additional locking mechanisms and speeding up installation in wood, metal, and composite materials. Its Grade 2 classification and 60,000 PSI tensile strength provide dependable performance in load-bearing applications, from framing and machinery to trailers and outdoor structures. The coarse UNC threading ensures quick engagement and reduced cross-threading risks, while the partial threading offers flexibility for varied material thicknesses. With a Rockwell B70 hardness and robust zinc plating, this bolt delivers long-term durability, making it a trusted choice for engineers and procurement specialists seeking cost-effective, compliant fastening solutions.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and 1/2"-13 UNC coarse threading for consistent assembly. It is manufactured to meet ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring dimensional accuracy and mechanical properties. The product is also compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, supporting sustainable and safe usage in global markets.