S-92620A275 1 1/4"-12 x 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, ensuring reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments
• Precise thread engagement with UNF fine threading and Class 2A fit, delivering secure fastening and vibration resistance
• Optimized torque transmission through the external hex drive and substantial 1 7/8" head width, facilitating easy installation with standard tools
• Consistent mechanical properties with Rockwell C33 hardness, maintaining structural integrity under repeated loads
• Full threading along the 2" length enables versatile positioning and maximum grip in various material thicknesses
• Regulatory compliance assurance meeting ASME B18.2.1, SAE J429 standards, and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where fastener failure is not an option. The UNF fine threading provides superior resistance to vibrational loosening compared to coarse threads, making it ideal for machinery, equipment manufacturing, and structural assemblies subject to dynamic loads. The zinc yellow-chromate plating creates a robust barrier against corrosion, significantly extending service life in environments exposed to moisture, chemicals, or outdoor conditions. With its 150,000 PSI tensile strength and Rockwell C33 hardness, this fully threaded fastener maintains clamping force under extreme pressure, preventing joint failure in critical connections. The substantial external hex drive design allows for high torque application during installation, ensuring proper preload in demanding applications across construction, automotive, and heavy equipment sectors.

Specification Summary & Compliance

This high-strength hex head screw features precise 1 1/4"-12 UNF fine threading with Class 2A thread fit tolerances, manufactured to ASME B18.2.1 and SAE J429 specifications for dimensional consistency and performance reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations governing chemical substances, ensuring environmental responsibility in industrial applications.