S-90185A180 3/8"-16 x 1 1/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-flake coating, ensuring long-lasting performance in harsh industrial environments.
• Exceptional tensile strength of 120,000 psi for reliable load-bearing in heavy-duty applications.
• Effective anti-rotation security due to the square neck design, preventing loosening under vibration.
• High hardness (Rockwell C25) provides excellent wear resistance and durability.
• Coarse UNC threads allow for quick and easy installation, reducing assembly time.
• Full threading offers versatile fastening options along the entire bolt length.
• Compliance with major standards including ASME B18.5 and SAE J429, ensuring quality and interoperability.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered for demanding industrial settings where reliability and safety are paramount. The zinc-flake coated steel construction resists corrosion, extending service life in outdoor or corrosive environments. The square neck and rounded head design prevent rotation during tightening, making it ideal for wood-to-metal connections, structural frameworks, and machinery assembly. With a coarse UNC thread and Class 2A thread fit, it ensures precise engagement and reduces the risk of cross-threading, streamlining maintenance and reducing downtime in heavy-duty fastening applications.

Specification Summary & Compliance

This carriage bolt features a 3/8"-16 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. It meets ASME B18.5 and SAE J429 specifications, ensuring adherence to industry manufacturing standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety requirements in global supply chains.