S-93548A630 3/8"-16 x 1 3/4" 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 prevents spinning during installation and under load, ensuring a secure and permanent fit.
• 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 Grade 2 classification, offering reliable holding power for demanding industrial and construction applications.
• Excellent durability with a Rockwell B70 hardness, resisting deformation and maintaining integrity under high stress.
• Wide compatibility and easy installation due to the coarse UNC thread and fully threaded design, allowing for quick assembly in a range of materials.
• Rounded carriage head style that provides a smooth, finished appearance and reduces the risk of snagging, ideal for wood and metal assemblies.
• Compliance with major industry standards including ASTM A307, SAE J429, and ASME B18.5, ensuring consistent quality and performance.

Professional Applications & Engineering Value

This 3/8"-16 UNC carriage bolt is engineered from zinc-plated steel to address common industrial challenges such as joint loosening and corrosion. The square neck design bites into the material, providing exceptional anti-rotation that is critical in dynamic load environments like construction frameworks, machinery assembly, and transportation equipment. Its coarse thread and fully threaded body enable faster installation and superior grip in wood, metal, and composite materials, reducing labor time and enhancing structural integrity. With a Grade 2 strength rating and high tensile capacity, it reliably secures heavy-duty applications, minimizing maintenance needs and downtime. Ideal for use in building projects, agricultural machinery, and outdoor structures, this bolt delivers long-term reliability and performance.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and UNC coarse threading for consistent engagement and ease of use. It complies with ASTM A307, SAE J429, and ASME B18.5 standards, ensuring dimensional accuracy and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant, meeting environmental regulations for safe use in various applications.