S-90185A221 1/4"-20 x 5" 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 tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Exceptional hardness rating of Rockwell C25 provides excellent resistance to wear and deformation, extending service life in demanding environments.
- Zinc-plated steel construction offers enhanced corrosion resistance, protecting the bolt from rust and environmental degradation.
- Square neck design prevents rotation during installation and use, ensuring a secure and stable fit without additional tools.
- Fully threaded UNC coarse threading allows for quick and easy assembly, reducing installation time and labor costs.
- Wide rounded carriage head distributes load evenly, minimizing surface damage and improving safety in structural applications.
- Compliance with industry standards including ASME B18.5, RoHS 3, and REACH ensures quality, safety, and environmental responsibility.
Professional Applications & Engineering Value
This Grade 5 carriage bolt is engineered to address common industrial challenges such as vibration loosening and material fatigue. The zinc-plated steel material provides durability against corrosion, making it ideal for outdoor or humid environments like construction, agricultural machinery, and transportation equipment. The square neck securely locks into materials, preventing spin-out during torque application, which is critical for assembly lines and maintenance operations. With UNC coarse threading and Class 3A thread fit, it ensures precise engagement and high resistance to stripping, reducing downtime and replacement costs. These features make it a reliable choice for heavy-duty fastening in frameworks, trailers, and industrial machinery where tensile strength and long-term performance are paramount.
Specification Summary & Compliance
This carriage bolt features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for precise dimensional accuracy. It meets ASME B18.5 specifications and is manufactured in compliance with SAE J429 Grade 5 standards for strength and reliability. Additionally, it adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are upheld.
