S-98060A720 3/8"-16 x 2" ASTM A307, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Enhanced Anti-Rotation Performance: The knurled neck design securely grips materials, preventing the bolt from turning during installation and ensuring stable, reliable fastening in wood and metal assemblies.
• Superior Corrosion Resistance: Zinc-plated steel construction provides excellent protection against rust and environmental wear, extending the bolt's service life in demanding industrial and outdoor applications.
• High Tensile Strength for Heavy-Duty Use: With a tensile strength of 60,000 PSI and Rockwell B69 hardness, this bolt offers robust load-bearing capacity, reducing the risk of failure under stress.
• Optimized Thread Design for Quick Assembly: UNC coarse threading and Class 2A thread fit enable faster installation and secure engagement, minimizing assembly time while maintaining precision.
• Secure Fastening with Wide Rounded Head: The wide, rounded carriage head distributes pressure evenly, reducing surface damage and providing a firm hold without sinking into softer materials.
• Versatile Partial Threading: Partially threaded design allows for effective clamping in a range of material thicknesses, enhancing flexibility in construction and machinery applications.
• Compliance with Industry Standards: Meets ASTM A307 and SAE J429 specifications, ensuring consistent quality and reliability for professional engineering and construction projects.

Professional Applications & Engineering Value

This 3/8"-16 UNC Grade 2 zinc-plated steel carriage bolt is engineered to address common challenges in industrial and construction settings, such as loosening under vibration and corrosion in harsh environments. The knurled neck effectively bites into materials, preventing rotation during torque application, which is critical for maintaining joint integrity in wooden structures, metal frameworks, and heavy machinery. Its coarse thread design ensures quick, secure fastening even in softer substrates, reducing installation time and labor costs. With a 60,000 PSI tensile strength and Rockwell B69 hardness, it withstands high-stress conditions, making it ideal for applications like trailer assemblies, agricultural equipment, and building frameworks where durability and reliability are paramount. The zinc plating adds a protective layer, combating moisture and chemical exposure to prolong service life in outdoor or industrial environments.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and UNC coarse threading (3/8"-16) with a minimum thread length of 1", ensuring dimensional accuracy and compatibility with standard nuts. Manufactured in accordance with ASTM A307 and SAE J429 specifications, it guarantees consistent performance and material quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for hazardous substance restrictions.