S-90185A119 3/8"-16 x 3/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Enhanced Durability and Corrosion Resistance with black-oxide steel finish, ideal for harsh industrial environments.
• Superior Anti-Rotation Security due to the square neck design, preventing loosening under vibration and dynamic loads.
• High Tensile Strength of 120,000 PSI (Grade 5) ensures reliable performance in heavy-duty structural and machinery applications.
• Excellent Hardness (Rockwell C25) provides resistance to wear and deformation, extending the fastener's service life.
• Coarse UNC Threads (3/8"-16) allow for quick and easy installation, even in materials where fine threads might be problematic.
• Full Threading Along the 3/4" Length offers maximum flexibility for nut placement and secure fastening in various material thicknesses.
• Wide, Rounded Carriage Head distributes clamping force effectively and presents a finished appearance, reducing the risk of snagging.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to solve critical challenges in industrial assembly and construction. The black-oxide steel construction provides a protective layer against rust and oxidation, making it suitable for outdoor equipment, agricultural machinery, and structural frameworks exposed to the elements. The combination of a square neck and a smooth, rounded head ensures the bolt remains securely locked in place, eliminating spin-out during nut tightening and preventing failure in high-vibration environments like conveyor systems or vehicle chassis. Its UNC coarse thread and Class 2A thread fit facilitate rapid installation in wood, metal, and other substrates, reducing assembly time while the high tensile strength guarantees the joint integrity under significant stress, providing long-term reliability for demanding industrial applications.

Specification Summary & Compliance

This fastener features a 3/8"-16 UNC thread with a Class 2A fit for standard dimensional accuracy and ease of assembly. It is manufactured to meet ASME B18.5 and SAE J429 specifications for Grade 5 carriage bolts, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various markets and applications.