S-98060A520 5/16"-18 x 1" SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel coating for extended service life in demanding environments
• Exceptional tensile strength of 120,000 psi (Grade 5) ensures reliable performance in high-stress applications
• Secure anti-rotation design with knurled neck prevents loosening under vibration and dynamic loads
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster installation and reliable connections
• Enhanced load distribution through wide rounded carriage head design minimizes surface damage
• Consistent hardness performance at Rockwell C25 maintains structural integrity under repeated stress
• Regulatory compliance assurance meeting SAE J429, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers critical engineering solutions for industrial assembly challenges. The zinc-plated steel construction provides essential corrosion protection in manufacturing facilities, agricultural equipment, and structural frameworks where environmental exposure is a concern. The knurled neck design addresses common vibration-induced loosening issues in machinery and transportation applications, maintaining joint integrity without requiring additional locking mechanisms. With UNC coarse threading and partial threading configuration, installation efficiency is significantly improved in wood-to-metal and structural steel connections, while the wide rounded head distributes clamping force effectively to prevent material deformation. These features combine to create a reliable heavy-duty fastener that reduces maintenance frequency and enhances operational safety across multiple industrial sectors.

Specification Summary & Compliance

Manufactured to precise inch measurement standards with 5/16"-18 UNC coarse thread configuration and Class 2A thread fit tolerance ensuring consistent performance. This carriage bolt conforms to SAE J429 specifications for Grade 5 fasteners and demonstrates compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The product maintains dimensional accuracy with a screw diameter of 0.313", 1" length, and minimum thread length of 7/16" as specified for industrial applications requiring standardized components.