S-90185A540 1/4"-20 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
- Exceptional load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance provided by zinc-plated steel coating, extending service life in harsh environments
- Secure anti-rotation installation enabled by the square neck design that prevents spinning during tightening
- Enhanced grip and stability from the wide rounded head profile that distributes clamping force effectively
- Quick assembly efficiency with UNC coarse threading that facilitates faster installation and reduces cross-threading risks
- Consistent performance reliability through Class 2A thread fit ensuring proper engagement with mating components
- Broad industrial compatibility with full threading along the entire 3/4" length for versatile fastening applications
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The square neck design mechanically locks into materials during installation, eliminating rotation issues that compromise joint security in wood-to-metal and structural connections. The UNC coarse thread pattern provides superior holding power in soft materials and faster assembly in production environments, while the zinc-plated finish creates a protective barrier against corrosion in outdoor, automotive, and construction applications. With 120,000 psi tensile strength and Rockwell C25 hardness, this fully threaded carriage bolt maintains clamping force under dynamic loads, making it ideal for heavy equipment, trailer assemblies, and structural frameworks where reliability cannot be compromised.
Specification Summary & Compliance
This carriage bolt features precision 1/4"-20 UNC coarse threads with Class 2A fit for consistent mating compatibility. Manufactured to ASME B18.5 specifications (SAE J429) with Grade 5 strength rating, 120,000 psi tensile strength, and Rockwell C25 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
