S-92620A339 1 1/2"-6 x 3 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for demanding industrial applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh environments
• Reliable thread engagement with Class 2A thread fit ensuring consistent installation and vibration resistance
• Optimized for heavy machinery featuring Grade 8 strength classification and Rockwell C33 hardness
• Enhanced torque application with 2 1/4" external hex head providing superior grip for high-tension fastening
• Quick installation in coarse materials using 1 1/2"-6 UNC coarse threads that resist cross-threading
• Versatile partial threading allowing both secure clamping and adjustable positioning capabilities

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance in heavy-duty industrial environments where fastener failure is not an option. The zinc yellow-chromate plated steel construction provides exceptional corrosion resistance for outdoor equipment, construction machinery, and marine applications. The 1 1/2"-6 UNC coarse thread design ensures rapid installation in structural steel, heavy fabrications, and industrial assemblies while resisting vibration-induced loosening. With 150,000 psi tensile strength and Rockwell C33 hardness, these partially threaded fasteners maintain integrity under extreme mechanical stress, making them ideal for critical connections in mining equipment, agricultural machinery, and transportation infrastructure where reliability and durability are paramount.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with 1 1/2"-6 UNC coarse thread specifications. Complies with ASME B18.2.1 and SAE J429 Grade 8 standards for dimensional accuracy and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for hazardous substance restrictions. Features partial threading with 3 1/4" minimum thread length on 3 1/2" overall length fasteners.