S-90185A273 3/4"-10 x 9" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
• Exceptional tensile strength of 120,000 psi (Grade 5) ensures reliable performance in heavy-load applications
• Anti-rotation security provided by the square neck design that prevents spinning during installation
• Optimized thread engagement with Class 3A UNC coarse threads for faster assembly and vibration resistance
• Enhanced durability with Rockwell C25 hardness for superior wear resistance and repeated use
• Wide rounded head profile distributes clamping force evenly and prevents pull-through in wood and metal
• Full threading along the 9" length provides maximum adjustability and connection versatility

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The square neck design mechanically locks into materials to prevent rotation during torque application, eliminating the need for secondary locking mechanisms. The UNC coarse threading ensures rapid installation in construction frameworks, agricultural equipment, and heavy-duty trailer assemblies where time efficiency matters. The zinc plating provides essential corrosion protection for outdoor and industrial environments, while the 120,000 psi tensile strength guarantees these fasteners maintain clamp force under dynamic loads and stress cycles common in automotive and infrastructure applications.

Specification Summary & Compliance

Manufactured to ASME B18.5 and SAE J429 Grade 5 specifications with Class 3A thread fit for precision tolerance. Features 3/4"-10 UNC coarse threads with right-hand orientation and full threading along the 9" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.