S-90185A227 1/4"-20 x 8" 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
- Exceptional load-bearing capacity with 120,000 psi tensile strength for demanding structural and construction applications
- Superior corrosion resistance provided by zinc-plated steel construction, extending service life in harsh environments
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable installation and vibration resistance
- Secure anti-rotation design featuring a square neck that prevents spinning during tightening in wood and metal assemblies
- Optimized head profile with wide rounded carriage head distributing clamp load effectively while maintaining aesthetic appeal
- Consistent performance quality backed by Grade 5 classification and Rockwell C25 hardness for dependable mechanical properties
- Full-length threading versatility allowing for flexible nut placement along the entire 8" shaft length
Professional Applications & Engineering Value
This Grade 5 carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor construction, agricultural equipment, and industrial machinery applications. The square neck design effectively solves the common problem of bolt rotation during assembly, particularly in wood-to-metal connections and framing applications. With UNC coarse threading and Class 3A thread fit, installation is streamlined while maintaining precise tolerances for heavy-duty fastening requirements. The combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures reliable performance in high-stress environments, making it ideal for structural supports, trailer manufacturing, and machinery frames where failure is not an option.
Specification Summary & Compliance
This carriage bolt maintains Class 3A thread fit precision with UNC 1/4"-20 coarse threading and complies with ASME B18.5 dimensional standards. Manufacturing adheres to Grade 5 mechanical properties with verified 120,000 psi tensile strength. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, ensuring regulatory acceptance for industrial and commercial applications worldwide.
