S-90185A636 3/8"-16 x 3" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 PSI tensile strength for reliable performance in heavy-duty applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh environments
• Secure anti-rotation design featuring a square neck that prevents spinning during installation and use
• Optimized thread engagement with UNC coarse spacing and Class 2A fit for faster assembly and reduced cross-threading risk
• Enhanced durability with Rockwell C25 hardness maintaining structural integrity under repeated stress
• Versatile fully-threaded design allowing for maximum adjustability and secure fastening across various material thicknesses
• Industry-standard compliance ensuring consistent quality and reliability across industrial applications

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions for industrial fastening challenges. The square neck design provides positive locking against rotation, eliminating the need for secondary locking mechanisms in structural connections, wood-to-metal joints, and machinery assembly. The UNC coarse threading ensures rapid installation in soft materials and weathered surfaces, while the zinc plating offers sacrificial protection against environmental corrosion in outdoor equipment, construction frameworks, and material handling systems. With its 120,000 PSI tensile strength and Rockwell C25 hardness, this fully-threaded carriage bolt maintains clamping force under vibration and dynamic loads, making it ideal for agricultural machinery, trailer manufacturing, and industrial platform construction where reliability is paramount.

Specification Summary & Compliance

This carriage bolt features precision 3/8"-16 UNC coarse threads with Class 2A thread fit tolerances for consistent engagement. Manufactured to ASME B18.5 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safe use across various industrial sectors.