S-90185A410 1/4"-20 x 1/2" 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, ideal for demanding structural connections
- Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh environments
- Enhanced thread reliability with Class 3A UNC coarse threading, ensuring secure fastening and vibration resistance
- Positive anti-rotation locking via square neck design, preventing bolt spinning during nut tightening
- Optimized material durability with Rockwell C25 hardness, maintaining structural integrity under heavy loads
- Broad compatibility with fully threaded right-hand design, accommodating various material thicknesses
- Regulatory compliance assurance meeting ASME B18.5, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These Grade 5 carriage bolts deliver critical engineering solutions for heavy-duty assembly challenges. The zinc-plated steel construction provides essential corrosion protection in outdoor equipment, agricultural machinery, and construction frameworks where environmental exposure compromises fastener integrity. The square neck carriage bolt design eliminates rotational movement during installation, significantly reducing assembly time in wood-to-metal connections and structural steel applications. With Class 3A UNC coarse threading, these fasteners maintain clamping force in vibrating environments while the 120,000 psi tensile strength ensures joint reliability in load-bearing structures. The rounded head profile distributes pressure evenly, preventing surface damage in timber and composite materials.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread specifications (1/4"-20). Complies with ASME B18.5 dimensional requirements and SAE J429 Grade 5 mechanical properties. Meets international regulatory standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for hazardous substance restrictions. Features include 0.25" screw diameter, 0.594" head diameter, and 1/2" length with fully threaded configuration.
