S-90185A432 7/16"-14 x 2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that locks securely into materials, preventing spinning during installation and use.
• Exceptional tensile strength of 120,000 PSI from Grade 5 classification, ensuring reliable load-bearing capacity in demanding applications.
• Enhanced corrosion resistance through zinc-plated steel construction, extending service life in various environmental conditions.
• Precise, reliable threading with Class 3A fit and UNC coarse pattern, providing easier assembly and reduced risk of cross-threading.
• Optimized for heavy-duty use featuring Rockwell C25 hardness and a wide, rounded carriage head for increased durability and surface distribution.
• Full-threaded design allows for maximum engagement and adjustability across the entire 2" length, suitable for diverse material thicknesses.
• Compliance with major industrial standards including ASME B18.5 and SAE J429, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address critical challenges in structural and machinery assemblies where vibration resistance and joint integrity are paramount. The square neck embeds firmly into wood or metal, eliminating rotation during torque application—a common failure point in dynamic environments. With a coarse UNC thread and Class 3A fit, it ensures rapid installation and high clamp force retention, reducing labor time and maintenance needs. The zinc plating offers a protective barrier against oxidation, making it ideal for outdoor equipment, agricultural machinery, and construction frameworks. Its 120,000 PSI tensile strength and Rockwell C25 hardness provide a safety margin in load-critical applications, from trailer hitches to industrial scaffolding, ensuring long-term reliability under stress.

Specification Summary & Compliance

This carriage bolt adheres to Class 3A thread tolerances for precision fit and is manufactured in accordance with ASME B18.5 and SAE J429 specifications. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. The fully threaded 7/16"-14 UNC coarse pattern and right-hand direction align with standard industrial practices for compatibility and ease of use.