S-90185A104 1/4"-20 x 1 3/4" 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 demanding applications
• Superior corrosion resistance provided by black-oxide steel coating, extending service life in various environments
• Secure anti-rotation installation through integrated square neck design that prevents spinning during tightening
• Precision thread engagement with Class 2A UNC coarse threads ensuring consistent, reliable fastening
• Enhanced durability from Rockwell C25 hardness, maintaining structural integrity under stress
• Wide application compatibility with fully threaded design accommodating various material thicknesses
• Industry-standard compliance meeting ASME B18.5 and SAE J429 specifications for quality assurance

Professional Applications & Engineering Value

These Grade 5 carriage bolts deliver exceptional engineering value across industrial applications where vibration resistance and secure fastening are critical. The black-oxide steel construction provides superior corrosion protection for outdoor equipment, agricultural machinery, and structural assemblies exposed to environmental elements. The square neck design effectively prevents rotation during installation, eliminating the need for secondary locking mechanisms and reducing assembly time in wood-to-metal applications, trailer manufacturing, and construction projects. With UNC coarse threading and Class 2A thread fit, these bolts ensure quick installation and reliable performance in soft materials while maintaining consistent clamping force in high-vibration environments. The fully threaded configuration accommodates various material thicknesses, making them versatile for both permanent and semi-permanent fastening solutions across multiple industrial sectors.

Specification Summary & Compliance

This carriage bolt features precision 1/4"-20 UNC coarse threading with Class 2A thread fit for consistent engagement and reliable performance. Manufactured to meet ASME B18.5 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring strict regulatory adherence.