S-90185A583 5/16"-18 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for heavy-duty applications
• Secure anti-rotation performance thanks to the square neck design that prevents spinning during installation
• Reliable thread engagement with UNC coarse threading and Class 2A fit ensuring consistent fastening performance
• Enhanced durability with Rockwell C25 hardness providing excellent resistance to wear and deformation
• Full-threaded convenience allowing for maximum adjustability and versatile installation options
• Regulatory compliance assurance meeting ASME B18.5, SAE J429, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers exceptional engineering value for industrial fastening applications where vibration resistance and structural integrity are critical. The zinc-plated steel construction provides superior corrosion protection, making it ideal for outdoor equipment, agricultural machinery, and construction applications exposed to harsh environmental conditions. The square neck design effectively prevents rotation during tightening, eliminating the need for secondary locking mechanisms and reducing installation time. With its UNC coarse threading and Class 2A thread fit, this fully threaded carriage bolt ensures quick assembly and reliable performance in wood-to-metal and structural steel connections, providing engineers with a trusted solution for demanding fastening requirements where safety and durability are paramount.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit with UNC coarse threading (5/16"-18) and meets rigorous manufacturing specifications including ASME B18.5 and SAE J429 standards. The fastener maintains dimensional accuracy with a 1" length, 0.3125" diameter, and square neck measuring 0.32" width. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance management, while the Grade 5 classification guarantees consistent mechanical properties including 120,000 psi tensile strength and Rockwell C25 hardness for reliable performance in industrial applications.