S-90185A626 3/8"-16 x 1 1/4" ASME B18.5, SAE J429 Carriage Bolts
Carriage Bolts
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Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior load-bearing capacity with 120,000 psi tensile strength and Grade 5 classification for demanding structural applications
- Enhanced corrosion resistance through zinc plating, extending service life in outdoor or humid industrial environments
- Secure anti-rotation design featuring a square neck that prevents spinning during installation in wood or metal assemblies
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring quick assembly and vibration resistance
- Consistent mechanical performance backed by Rockwell C25 hardness for reliable durability under repeated stress
- Broad compatibility with standard 3/8"-16 components and machinery requiring coarse-thread fasteners
- Simplified inventory management through compliance with ASME B18.5 and SAE J429 manufacturing standards
Professional Applications & Engineering Value
Engineered for heavy-duty fastening in construction, agricultural equipment, and machinery frames, these Grade 5 carriage bolts address critical challenges of joint integrity and long-term reliability. The zinc-plated steel construction combats environmental degradation while the fully threaded UNC pattern with coarse spacing enables rapid installation in structural timber or metal channels. The integrated square neck mechanically locks the bolt against rotation during torque application, eliminating the need for secondary retention methods in high-vibration environments. This combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures consistent performance in load-bearing connections where failure is not an option.
Specification Summary & Compliance
Manufactured to Class 2A thread fit tolerances with UNC coarse threading (3/8"-16) per standardized dimensions. Complies with ASME B18.5 and SAE J429 specifications for dimensional consistency and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions. All bolts feature right-hand threading and 1 1/4" length with precise 0.39" square neck dimensions for uniform performance across production batches.
