S-90185A424 3/8"-16 x 2 3/4" 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 corrosion resistance with zinc-plated steel construction, extending service life in harsh environments
- Exceptional tensile strength of 120,000 psi (Grade 5) for reliable performance in high-stress applications
- Secure anti-rotation design with square neck that prevents spinning during installation and tightening
- Precision threading with Class 3A UNC coarse threads ensures smooth installation and superior thread engagement
- Optimized load distribution through wide rounded head profile that minimizes surface damage
- Enhanced durability with Rockwell C25 hardness that maintains structural integrity under repeated stress
- Broad compatibility with right-hand fully threaded design for versatile use across industrial applications
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The square neck design mechanically locks into materials, eliminating rotation during assembly - particularly valuable in wood-to-metal connections and structural framing. The zinc plating provides sacrificial corrosion protection, making it ideal for outdoor construction, agricultural equipment, and industrial machinery exposed to environmental elements. With UNC coarse threading and Class 3A thread fit, installation is accelerated while maintaining precise tolerances. The fully threaded configuration accommodates varying material thicknesses in assembly applications, while the 120,000 psi tensile strength ensures reliable performance in heavy-duty fastening scenarios where joint integrity cannot be compromised.
Specification Summary & Compliance
This carriage bolt features precision 3/8"-16 UNC coarse threads with Class 3A thread fit for superior engagement. Manufacturing complies with ASME B18.5 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental standards for restricted substances.
