S-98060A690 3/8"-16 x 1 1/2" ASTM A307, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance due to the knurled neck design, preventing loosening under vibration in demanding applications.
• Excellent corrosion resistance provided by the zinc-plated steel finish, extending service life in various industrial environments.
• High tensile strength of 60,000 psi (Grade 2) ensures reliable load-bearing capacity for construction and heavy-duty fastening.
• Wide, rounded carriage head offers a larger bearing surface for secure fastening without sinking into softer materials like wood.
• Coarse UNC threading (3/8"-16) enables quick and easy installation, reducing assembly time and labor costs.
• Precise Class 2A thread fit guarantees consistent, reliable engagement with nuts for a secure, vibration-resistant connection.
• Full threading along the 1 1/2" length provides maximum flexibility in grip range and adjustment for various material thicknesses.

Professional Applications & Engineering Value

This zinc-plated steel carriage bolt is engineered to solve critical fastening challenges in industrial and construction applications. The combination of Grade 2 strength and a Rockwell B69 hardness ensures it withstands high stress without shearing, while the fully threaded UNC coarse pattern and knurled neck work in tandem to prevent rotation and loosening under dynamic loads. This makes it ideal for securing structural timber, machinery frames, and heavy equipment where vibration is a constant concern. Its rounded head design distributes pressure evenly, minimizing damage to connected surfaces and providing a clean, finished appearance. By integrating these features, the bolt delivers long-term reliability, reducing maintenance needs and downtime in demanding operational environments.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional standards, including a Class 2A thread fit and UNC coarse thread (3/8"-16), ensuring compatibility and ease of assembly. It is manufactured in compliance with ASTM A307 and SAE J429 specifications, confirming its mechanical properties and quality. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.