S-93604A615 1/4"-20 x 1 1/4" ASTM A307, ASTM A153, ASME B18.5 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 corrosion resistance with hot-dipped galvanized steel coating for long-lasting performance in harsh environments
- Enhanced anti-rotation security through square neck design that prevents bolt spinning during installation and use
- Reliable load-bearing capacity with Grade 2 strength rating and 60,000 psi tensile strength for demanding applications
- Optimized thread engagement with UNC coarse threading ensuring quick assembly and vibration resistance
- Precise dimensional accuracy with Class 2A thread fit for consistent performance and easy installation
- Robust material hardness at Rockwell B70 providing excellent durability and wear resistance
- Comprehensive compliance meeting major industry standards and environmental regulations
Professional Applications & Engineering Value
This hot-dipped galvanized steel carriage bolt delivers exceptional engineering value for industrial applications where corrosion resistance and anti-rotation performance are critical. The square neck design effectively prevents rotation during tightening, making it ideal for wood-to-metal connections, structural framing, and machinery assembly where vibration is a concern. The Grade 2 strength classification combined with 60,000 psi tensile strength ensures reliable performance in load-bearing applications, while the UNC coarse threading provides superior grip and faster installation in various materials. The hot-dipped galvanization creates a thick, durable barrier against moisture and chemical exposure, significantly extending service life in outdoor, marine, or industrial environments where corrosion typically compromises fastener integrity.
Specification Summary & Compliance
This carriage bolt features precise Class 2A thread fit with 1/4"-20 UNC coarse threading and right-hand thread direction. Manufactured to meet ASTM A307 and ASTM A153 specifications for carbon steel bolts and zinc coating, with dimensional compliance to ASME B18.5. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
