S-93604A647 5/16"-18 x 1 3/4" 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, ideal for outdoor and harsh industrial environments
- Prevents rotation during installation thanks to the integrated square neck design that locks securely into materials
- High tensile strength of 60,000 psi ensures reliable performance in structural and heavy-duty applications
- Full UNC coarse threading provides faster assembly and strong holding power in wood and metal
- Class 2A thread fit guarantees consistent, easy installation with standard nuts and tools
- Wide, rounded head profile distributes load evenly and reduces surface damage
- Compliance with ASTM A307 and ASME B18.5 ensures consistent quality and interchangeability
Professional Applications & Engineering Value
These hot-dipped galvanized steel carriage bolts are engineered to solve common industrial challenges, such as fastener loosening under vibration and corrosion in exposed settings. The square neck design bites into the material to prevent spinning during tightening, making them ideal for wood-to-metal connections in construction, agricultural equipment, and trailer assemblies. With a Rockwell B70 hardness and 60,000 psi tensile strength, they withstand high stress without shearing. The fully threaded UNC coarse thread ensures quick, secure fastening in soft materials, while the hot-dipped galvanized coating provides a durable barrier against rust, extending service life in humid or corrosive environments. These bolts deliver reliable, long-term performance for structural framing, fencing, and machinery where safety and durability are critical.
Specification Summary & Compliance
This 5/16"-18 carriage bolt features precise Class 2A thread fit and UNC coarse threading per ASME B18.5 standards. Manufactured from Grade 2 steel with a tensile strength of 60,000 psi and Rockwell B70 hardness, it meets ASTM A307 specifications for low-carbon steel bolts. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to.
