S-92620A341 1 1/2"-6 x 4 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 capability with 150,000 PSI tensile strength and Grade 8 classification for demanding industrial applications
• Superior corrosion resistance through zinc yellow-chromate plating that extends service life in harsh environments
• Optimized torque transmission with external hex drive design and 2 1/4" head width for secure installation
• Reliable thread engagement featuring Class 2A thread fit and coarse UNC threading for vibration resistance
• Enhanced material durability with Rockwell C33 hardness that maintains integrity under heavy stress
• Versatile partial threading allowing both secure fastening and adjustable positioning in assemblies
• Regulatory compliance assurance meeting ASME, SAE, RoHS 3 and REACH standards for quality and safety

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment where failure is not an option. The 1 1/2"-6 UNC coarse threading provides superior resistance to vibrational loosening while the zinc yellow-chromate plating creates a durable barrier against corrosion in outdoor or chemically aggressive environments. With 150,000 PSI tensile strength and Rockwell C33 hardness, this fastener maintains clamping force under extreme loads, preventing joint failure in critical applications. The external hex drive design ensures reliable torque application during installation, while the partial threading allows for precise adjustment in complex assemblies. These features combine to create a fastener that solves common industrial challenges of corrosion, vibration, and high-load requirements.

Specification Summary & Compliance

This heavy-duty fastener features precision Class 2A thread fit with 1 1/2"-6 UNC coarse threading and 4 1/2" length with 3 1/4" minimum thread length. Manufactured to exacting ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.