S-90185A223 1/4"-20 x 6" 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 tensile strength of 120,000 psi (Grade 5) ensures reliable performance under heavy loads and vibration
• Enhanced anti-rotation security through square neck design that locks securely into materials during installation
• Optimized thread engagement with Class 3A UNC coarse threads for faster assembly and reduced cross-threading risk
• Wide bearing surface from rounded carriage head distributes clamping force evenly across connected materials
• Consistent hardness at Rockwell C25 provides excellent durability and resistance to deformation
• Full threading capability allows for maximum adjustability and secure fastening through various material thicknesses

Professional Applications & Engineering Value

These Grade 5 zinc-plated steel carriage bolts deliver critical engineering solutions for industrial and construction applications where vibration resistance and structural integrity are paramount. The square neck design effectively prevents rotation during torque application, making them ideal for wood-to-metal connections, structural framing, and heavy equipment assembly. The UNC coarse thread pattern ensures quick installation in various materials while the zinc plating provides essential corrosion protection for outdoor and high-moisture environments. With 120,000 psi tensile strength and Rockwell C25 hardness, these fasteners maintain clamping force under dynamic loads, preventing joint failure in demanding applications from construction to agricultural equipment.

Specification Summary & Compliance

This 1/4"-20 carriage bolt features precision Class 3A thread fit with UNC coarse threading and fully threaded right-hand design. Manufactured to ASME B18.5 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for regulated industrial applications worldwide.