S-97000A520 5/16"-18 x 3" 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 150,000 PSI tensile strength and Rockwell C33 hardness for reliable performance in high-stress environments.
- Superior corrosion protection through zinc yellow-chromate plating, extending service life in harsh industrial conditions.
- Secure anti-rotation design featuring a square neck that locks into materials during tightening, preventing spin-out.
- Easy, fast installation with fully threaded UNC coarse pattern and right-hand direction for efficient assembly.
- Precise thread fit with Class 2A tolerance ensuring consistent engagement and reduced risk of cross-threading.
- Wide, rounded carriage head (0.719" diameter) distributes clamping force evenly and provides a finished appearance.
- Compliance with rigorous standards including ASME B18.5 and SAE J429, guaranteeing quality and interchangeability.
Professional Applications & Engineering Value
This Grade 8 carriage bolt is engineered to solve critical challenges in heavy machinery, structural framing, and transportation equipment. The zinc yellow-chromate plating offers robust resistance to rust and environmental wear, ideal for outdoor or corrosive settings. Its fully threaded UNC coarse pattern and square neck work together to prevent rotation during torque application, ensuring a secure fit in wood, metal, or composite materials. With a 150,000 PSI tensile strength and Rockwell C33 hardness, it withstands extreme vibrational and tensile loads, reducing maintenance needs and enhancing operational safety in demanding industrial applications.
Specification Summary & Compliance
This carriage bolt adheres to Class 2A thread fit for consistent assembly and features a 5/16"-18 UNC coarse thread with right-hand direction. It meets ASME B18.5 and SAE J429 specifications, ensuring dimensional accuracy and material integrity. The product complies with industry standards for heavy-duty fastening, providing reliable performance in construction, automotive, and machinery sectors.
