S-90185A581 5/16"-18 x 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 for extended service life in harsh environments
- Prevents rotation during installation thanks to the square neck design that locks securely into materials
- High-strength performance with Grade 5 classification and 120,000 psi tensile strength for demanding applications
- Excellent durability from Rockwell C25 hardness that resists wear and deformation under load
- Reliable coarse threading with UNC 5/16"-18 threads providing strong holding power in various materials
- Precision manufacturing with Class 2A thread fit ensuring consistent performance and easy installation
- Wide application compatibility with fully threaded design accommodating various material thicknesses
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt delivers exceptional engineering value in industrial fastening applications where vibration resistance and structural integrity are critical. The square neck carriage bolt design eliminates spinning during installation, making it ideal for wood-to-metal connections in construction, agricultural equipment, and transportation applications. The zinc-plated finish provides reliable corrosion protection, while the fully threaded UNC coarse thread ensures maximum grip strength in soft materials and wood. With 120,000 psi tensile strength and Rockwell C25 hardness, this heavy-duty fastener maintains clamping force under extreme conditions, preventing joint failure in machinery, structural frameworks, and industrial assemblies where reliability is non-negotiable.
Specification Summary & Compliance
This carriage bolt features precision Class 2A thread fit with UNC 5/16"-18 coarse threading and right-hand thread direction. Manufactured to ASME B18.5 standards and meeting SAE J429 Grade 5 requirements for mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while maintaining consistent dimensional accuracy and performance reliability.
