S-90185A225 1/4"-20 x 7" 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 - Grade 5 classification provides 120,000 psi tensile strength for reliable performance in demanding applications
- Superior Corrosion Resistance - Zinc-plated steel construction offers enhanced protection against rust and environmental degradation
- Secure Anti-Rotation Design - Square neck prevents bolt rotation during installation and use, ensuring stable fastening
- Precision Thread Performance - Class 3A UNC coarse threads deliver optimal engagement and vibration resistance
- Wide Bearing Surface - Rounded carriage head design distributes clamping force evenly, reducing surface damage
- Full Thread Accessibility - Completely threaded 7" length allows for flexible positioning and deep penetration applications
- Industry Compliance Assurance - Meets ASME B18.5 standards with full regulatory compliance for global industrial use
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions for industrial fastening challenges where vibration resistance and structural integrity are paramount. The square neck design effectively prevents rotation during torque application, eliminating the need for secondary locking mechanisms in wood-to-metal and structural steel applications. The UNC coarse threading ensures rapid installation and superior performance in softer materials while maintaining Class 3A thread fit precision for consistent clamping force. With 120,000 psi tensile strength and Rockwell C25 hardness, this fully threaded carriage bolt withstands heavy dynamic loads in construction equipment, trailer assemblies, and agricultural machinery, providing long-term reliability in corrosive environments through its zinc-plated surface protection.
Specification Summary & Compliance
This 1/4"-20 carriage bolt features precise Class 3A thread fit with UNC coarse threading and full 7" length. Manufactured to ASME B18.5 standards (SAE J429) with Grade 5 classification, ensuring 120,000 psi tensile strength and Rockwell C25 hardness. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety standards for industrial fastener applications.
