S-90185A243 7/16"-14 x 2 1/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in heavy-duty applications, reducing the risk of fastener failure.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life in harsh industrial environments.
• Square neck design prevents rotation during installation, ensuring secure and stable fastening without the need for additional tools.
• Class 3A thread fit with UNC coarse spacing offers superior thread engagement and ease of assembly, minimizing cross-threading risks.
• Fully threaded shank allows for maximum adjustability and grip length, accommodating various material thicknesses.
• Grade 5 classification guarantees consistent hardness (Rockwell C25) and mechanical properties for dependable performance.
• Compliance with ASME B18.5 and SAE J429 ensures adherence to industry standards, providing peace of mind for engineering specifications.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address common challenges in industrial fastening, such as vibration-induced loosening and corrosion. The square neck integrates seamlessly into pre-drilled holes, locking the bolt in place to prevent spinning during nut tightening—ideal for structural connections in machinery, trailers, and construction frameworks. Its UNC coarse thread and Class 3A fit enhance assembly efficiency, reducing installation time while maintaining high tensile integrity. The zinc plating acts as a sacrificial layer, protecting against rust in outdoor or humid conditions, making it suitable for agricultural equipment, automotive assemblies, and infrastructure projects where durability is critical.

Specification Summary & Compliance

This carriage bolt features a diameter of 0.4375" (7/16") with a length of 2-1/4", manufactured to inch system standards. Thread specifications include UNC coarse spacing, right-hand direction, and a precision Class 3A thread fit for consistent performance. It conforms to ASME B18.5 and SAE J429 specifications, ensuring dimensional accuracy and mechanical reliability. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.