S-90185A120 3/8"-16 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating for extended service life in harsh industrial environments
• Exceptional 120,000 psi tensile strength and Grade 5 classification for reliable performance in heavy-duty applications
• Secure anti-rotation locking with integrated square neck design that prevents spinning during installation
• Optimized thread engagement through UNC coarse threading and Class 2A fit for faster assembly and maximum holding power
• Enhanced durability with Rockwell C25 hardness rating that maintains structural integrity under repeated stress
• Wide-rounded head profile provides larger bearing surface for improved load distribution and reduced surface damage
• Full compliance with industry standards including ASME B18.5, RoHS 3, and REACH for guaranteed quality and environmental safety

Professional Applications & Engineering Value

This Grade 5 carriage bolt with black-oxide steel construction addresses critical industrial fastening challenges where corrosion resistance and structural integrity are paramount. The fully threaded UNC coarse spacing design ensures rapid installation in wood-to-metal and structural steel applications, while the square neck provides positive locking that eliminates rotation during torque application. Engineered for heavy machinery, agricultural equipment, and construction frameworks, the combination of 120,000 psi tensile strength and Rockwell C25 hardness delivers reliable performance in high-vibration environments. The black-oxide coating offers superior protection against rust and oxidation, making these carriage bolts ideal for both indoor industrial settings and outdoor applications exposed to weather elements.

Specification Summary & Compliance

This carriage bolt features precision 3/8"-16 UNC coarse thread with Class 2A fit tolerance for consistent performance across industrial applications. Manufactured to ASME B18.5 specifications and meeting SAE J429 Grade 5 requirements, the fastener ensures dimensional accuracy and mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and regulatory adherence for global industrial use.