S-90185A231 5/16"-18 x 7" 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 for extended service life in demanding environments
- Exceptional load-bearing capacity with Grade 5 rating and 120,000 PSI tensile strength for heavy-duty applications
- Secure anti-rotation design featuring a square neck that prevents spinning during installation and tightening
- Precision threading with Class 3A fit and UNC coarse spacing for faster assembly and reliable engagement
- Enhanced durability with Rockwell C25 hardness providing excellent resistance to wear and deformation
- Versatile full-thread design allowing for maximum adjustability and grip length in various material thicknesses
- Regulatory compliance meeting ASME B18.5 and SAE J429 standards for guaranteed quality and performance
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 securely locks into materials, eliminating rotation during torque application - a common challenge in wood-to-metal and structural steel connections. With its fully threaded UNC coarse spacing and Class 3A thread fit, installation efficiency is maximized while maintaining precise tolerance control. The combination of 120,000 PSI tensile strength and Rockwell C25 hardness ensures reliable performance in heavy machinery, construction frameworks, transportation equipment, and agricultural implements where dynamic loads and environmental exposure would compromise inferior fasteners.
Specification Summary & Compliance
This carriage bolt maintains Class 3A thread fit precision with UNC coarse thread spacing (5/16"-18) and complies with ASME B18.5 and SAE J429 manufacturing specifications. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe use across industrial sectors. Manufacturing adheres to strict dimensional tolerances for the 7" length, 0.3125" diameter, and square neck configuration (0.19" length, 0.32" width) to guarantee consistent performance and interchangeability.
