S-92356A599 5/16"-18 x 4" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Exceptional anti-rotation security thanks to the square neck design that prevents spinning during installation
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress conditions
• Optimized for quick installation with coarse UNC threading that reduces assembly time and prevents cross-threading
• Consistent dimensional accuracy with Class 2A thread fit for precise mating with nuts and components
• Wide rounded head profile provides enhanced bearing surface and professional finished appearance
• Full regulatory compliance meeting ASME B18.5 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 18-8 stainless steel carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The square neck design mechanically locks into mounting surfaces, eliminating rotation during torque application - a common failure point in dynamic environments. With fully threaded UNC coarse threading, installation efficiency is maximized while maintaining Class 2A precision fit. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures structural integrity in heavy-duty applications including construction frameworks, machinery assembly, transportation equipment, and outdoor structures exposed to weather elements. The rounded carriage head with wide bearing surface distributes clamping force evenly, preventing surface damage while providing a clean, finished appearance.

Specification Summary & Compliance

This carriage bolt features 5/16"-18 UNC coarse threading with Class 2A thread fit per ASME standards, ensuring dimensional accuracy and reliable performance. Manufacturing complies with ASME B18.5 specifications for carriage bolts, guaranteeing consistent quality and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) compliance for chemical safety, making it suitable for regulated industries and international markets.