S-90185A177 5/16"-18 x 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-flake coating for extended service life in harsh industrial environments
- Exceptional load-bearing capacity with 120,000 PSI tensile strength for heavy-duty applications
- Anti-rotation security through integrated square neck design that prevents spinning during installation
- Optimized thread engagement with UNC coarse threading for faster assembly and reduced cross-threading risk
- Consistent performance maintained through Rockwell C25 hardness and Grade 5 classification
- Broad compatibility with Class 2A thread fit ensuring reliable mating with standard nuts
- Regulatory compliance meeting ASME B18.5, SAE J429, RoHS 3, and REACH standards for global acceptance
Professional Applications & Engineering Value
This Grade 5 carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The zinc-flake coated steel construction provides superior corrosion protection compared to conventional plating, making it ideal for outdoor construction, agricultural equipment, and industrial machinery exposed to weather elements. The square neck design mechanically locks into mounting surfaces, eliminating rotational movement that compromises joint security in structural steel connections, trailer assemblies, and wood-to-metal fastening applications. With fully threaded UNC coarse spacing, installation efficiency is maximized while maintaining 120,000 PSI tensile strength for demanding load requirements across infrastructure projects and heavy equipment manufacturing.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC 5/16"-18 coarse thread specifications. Complies with ASME B18.5 and SAE J429 standards for Grade 5 fasteners, ensuring consistent quality and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for restricted substance control. The 4" length with 0.3125" diameter and fully threaded right-hand configuration provides versatile application coverage across industrial and construction sectors.
