S-93548A806 5/8"-11 x 3" 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 environments
• Secure anti-rotation performance through integrated square neck design that prevents bolt spinning during installation
• High tensile strength rating of 60,000 psi (Grade 2) for reliable performance in heavy-duty applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and reduced cross-threading risk
• Enhanced durability with Rockwell B70 hardness that maintains structural integrity under repeated stress
• Wide bearing surface from the rounded carriage head design that distributes load effectively and minimizes surface damage
• Full threading capability allowing for maximum adjustability and secure fastening across the entire 3" length

Professional Applications & Engineering Value

These zinc-plated steel carriage bolts deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The square neck design mechanically locks into mating materials, eliminating rotation during nut tightening and preventing loosening in high-vibration environments like heavy machinery, construction frameworks, and transportation equipment. The UNC coarse thread pattern with Class 2A fit ensures rapid installation while maintaining precise tolerances, significantly reducing assembly time in industrial settings. The zinc plating provides sacrificial corrosion protection, making these Grade 2 carriage bolts suitable for outdoor applications, agricultural equipment, and structural connections where environmental exposure is a concern. With their 60,000 psi tensile strength and fully threaded configuration, they offer versatile fastening solutions across construction, manufacturing, and maintenance operations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (5/8"-11). Complies with ASTM A307, SAE J429 Grade 2, and ASME B18.5 manufacturing standards. Meets environmental compliance requirements including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Features Rockwell B70 hardness rating and 60,000 psi minimum tensile strength as specified for Grade 2 fasteners.