S-93548A903 3/4"-10 x 5" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Exceptional anti-rotation performance thanks to the integrated square neck design that prevents spinning during installation and under vibration
• Reliable heavy-duty fastening with Grade 2 strength rating and 60,000 psi tensile strength for demanding applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring secure connections and easier assembly
• Enhanced load distribution from the wide rounded head design that minimizes surface pressure and material damage
• Full-threaded versatility allowing installation through varying material thicknesses without compromising grip length
• Consistent hardness performance with Rockwell B70 rating maintaining structural integrity under mechanical stress

Professional Applications & Engineering Value

This zinc-plated steel carriage bolt delivers critical engineering solutions where vibration resistance and rotational stability are paramount. The square neck design mechanically locks into materials during installation, eliminating the common problem of bolt spinning that plagues traditional fasteners in wood-to-metal and structural connections. With its fully threaded UNC coarse thread configuration and Class 2A thread fit, it provides superior pull-out resistance in construction applications, heavy machinery assembly, and industrial equipment framing. The combination of Grade 2 strength (60,000 psi tensile) and Rockwell B70 hardness ensures reliable performance in high-stress environments while the zinc plating offers essential corrosion protection for outdoor and moisture-exposed applications.

Specification Summary & Compliance

This carriage bolt features precision 3/4"-10 UNC coarse threading with Class 2A thread fit tolerances for consistent engagement. Manufacturing complies with ASTM A307, SAE J429, and ASME B18.5 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial and construction applications.