S-93604A638 1/4"-20 x 7" 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
- Exceptional corrosion resistance from hot-dipped galvanized steel coating, ideal for outdoor and harsh environment applications
- Secure anti-rotation performance due to the integrated square neck design, preventing bolt spin during installation
- High tensile strength of 60,000 PSI (Grade 2) ensures reliable load-bearing capacity for demanding structural connections
- Rockwell B70 hardness provides excellent durability and resistance to deformation under stress
- 1/4"-20 UNC coarse threading with Class 2A fit offers easy, rapid assembly and reliable engagement in various materials
- 6" minimum thread length on a 7" shank allows for versatile grip range and secure fastening in thick assemblies
- Compliance with ASTM A307, ASTM A153, and ASME B18.5 standards guarantees consistent quality and engineering reliability
Professional Applications & Engineering Value
This hot-dipped galvanized steel carriage bolt is engineered to address common industrial challenges such as corrosion in outdoor settings and the need for vibration-resistant fastening. The Grade 2 strength and Rockwell B70 hardness ensure it withstands heavy loads and impacts, making it suitable for construction, agricultural equipment, and infrastructure projects. The square neck design locks securely into wood or metal, preventing rotation during torque application, while the 1/4"-20 UNC coarse thread facilitates quick installation. Its partial threading and 7" length provide flexibility for varied material thicknesses, offering a dependable solution for industrial fasteners requiring long-term durability and compliance with rigorous standards.
Specification Summary & Compliance
This carriage bolt features precise Class 2A thread fit and UNC coarse threading per ASME B18.5, ensuring dimensional accuracy and compatibility. Manufactured to ASTM A307 for bolt strength and ASTM A153 for zinc coating, it meets industry specifications for mechanical properties and corrosion protection. The product is fully RoHS 3 (2015/863/EU) Compliant, adhering to environmental regulations for hazardous substance restrictions.
