S-90185A277 7/8"-9 x 7 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 tensile strength of 120,000 PSI ensures reliable performance in heavy-duty applications, reducing the risk of fastener failure under high stress.
- Zinc-plated steel construction provides excellent corrosion resistance, extending the bolt's service life in harsh industrial or outdoor environments.
- Square neck and rounded carriage head design prevents rotation during installation, offering secure, anti-loosening fastening without needing extra tools.
- Class 3A thread fit with UNC coarse threading delivers precise, easy engagement and superior vibration resistance in demanding settings.
- Grade 5 hardness (Rockwell C25) guarantees durability and wear resistance, maintaining integrity through repeated use.
- Partial threading allows for optimal clamp force distribution, ideal for materials where full threading isn't necessary.
- Compliance with ASME B18.5 and SAE J429 standards ensures consistent quality and interoperability in professional assemblies.
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in structural applications. The wide rounded carriage head with square neck locks securely into place, eliminating the need for additional anti-rotation measures in wood-to-metal or construction joints. Its UNC coarse thread and Class 3A fit provide quick assembly and reliable hold in heavy machinery, automotive frames, and building infrastructure, where 120,000 PSI tensile strength and Rockwell C25 hardness ensure long-term performance without deformation. The zinc plating further enhances resistance to environmental factors, making it a versatile choice for both indoor and outdoor industrial fastening needs.
Specification Summary & Compliance
This bolt features a 7/8"-9 UNC coarse thread with Class 3A tolerance for precise fit, and adheres to ASME B18.5 and SAE J429 manufacturing specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
