S-93548A808 5/8"-11 x 3 1/2" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments.
• Exceptional holding power with Grade 2 strength and 60,000 PSI tensile strength, ensuring reliable performance under high stress.
• Prevents rotation during installation thanks to the integrated square neck, providing a secure, non-slip fit.
• Wide bearing surface from the rounded carriage head distributes load effectively, reducing surface damage.
• Easy and quick installation with coarse UNC threading and Class 2A fit, ideal for rapid assembly in industrial settings.
• Versatile full-thread design allows for use with a wide range of material thicknesses and nut positions.
• Compliance with major industry standards guarantees consistent quality and interchangeability for your projects.

Professional Applications & Engineering Value

This heavy-duty carriage bolt is engineered to solve common fastening challenges in construction, machinery assembly, and structural applications. The zinc-plated steel material provides a robust barrier against rust and corrosion, essential for outdoor or high-moisture environments. The square neck design is critical for preventing the bolt from spinning during nut tightening, which is a frequent issue in wood-to-metal or composite material joints. With its coarse UNC thread and Class 2A fit, it offers excellent grip and is less prone to cross-threading, speeding up assembly lines and reducing installation errors. The combination of 60,000 PSI tensile strength and a wide, rounded head makes it an ideal choice for applications requiring a strong, tamper-resistant, and visually clean finish, such as in trailer building, agricultural equipment, and framing projects.

Specification Summary & Compliance

This bolt features a 5/8"-11 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. It is manufactured in compliance with ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring dimensional accuracy and performance reliability. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.