S-90185A237 3/8"-16 x 7" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 PSI tensile strength, ideal for heavy-duty structural applications
• Superior corrosion resistance due to zinc-plated steel construction, extending service life in harsh environments
• Secure anti-rotation locking provided by the square neck design, preventing bolt spinning during installation
• Reliable coarse UNC threading ensures quick assembly and strong holding power in wood and metal
• Precision Class 3A thread fit guarantees consistent performance and compatibility with standard nuts
• Optimized hardness (Rockwell C25) maintains structural integrity under high stress and vibration
• Wide rounded carriage head distributes clamping force evenly while providing a finished appearance

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers critical engineering solutions for industrial fastening challenges. The zinc-plated steel construction combats corrosion in outdoor construction and manufacturing environments, while the fully threaded UNC coarse pattern enables rapid installation in structural wood assemblies and machinery frames. The integrated square neck eliminates rotation during torque application, preventing damage to connected materials. With 120,000 PSI tensile strength and Rockwell C25 hardness, it maintains clamping force under dynamic loads, making it indispensable for trailer manufacturing, agricultural equipment, and infrastructure projects where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to Class 3A thread fit tolerances with UNC 3/8"-16 coarse threading. Conforms to ASME B18.5 and SAE J429 Grade 5 specifications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.