S-93604A665 5/16"-18 x 6" 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, ideal for outdoor and high-moisture environments.
- Enhanced load-bearing capacity with 60,000 PSI tensile strength and Grade 2 classification for reliable structural support.
- Secure anti-rotation design featuring a square neck that locks into materials, preventing spinning during installation.
- Easy installation and removal with UNC coarse threading and Class 2A thread fit for smooth engagement and disassembly.
- Durable rounded head profile that distributes pressure evenly and resists surface damage in heavy-duty applications.
- Consistent performance backed by Rockwell B70 hardness, ensuring long-term fastener integrity under stress.
- Full regulatory compliance meeting ASTM A307, ASME B18.5, RoHS 3, and REACH standards for safe, quality-assured use.
Professional Applications & Engineering Value
This hot-dipped galvanized steel carriage bolt is engineered to address common industrial challenges such as corrosion, vibration loosening, and structural instability. The fully threaded 5/16"-18 UNC coarse thread design ensures maximum grip in wood, metal, and composite materials, while the square neck provides a firm, non-rotating fit that eliminates the need for additional locking mechanisms. With a 60,000 PSI tensile strength and Rockwell B70 hardness, it delivers reliable performance in demanding environments like construction, agricultural equipment, and transportation infrastructure. The thick zinc coating from the hot-dip process offers long-lasting protection against rust and weathering, reducing maintenance costs and extending service life in outdoor or corrosive settings.
Specification Summary & Compliance
This carriage bolt features precise Class 2A thread fit and UNC coarse threading (5/16"-18) for consistent fastening accuracy. It complies with ASTM A307 for carbon steel bolts and ASME B18.5 for dimensional standards, ensuring interchangeability and reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial use.
