S-92620A915 7/8"-9 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 capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
• Optimized installation efficiency with external hex drive design providing maximum torque transfer and secure fastening
• Enhanced thread engagement through fully threaded UNC coarse pattern ensuring superior holding power in various materials
• Premium material integrity featuring Grade 8 steel with Rockwell C33 hardness for exceptional durability and wear resistance
• Precision manufacturing compliance meeting ASME B18.2.1 and SAE J429 specifications for consistent quality and reliability
• Versatile industrial application with Class 2A thread fit ensuring proper clearance and compatibility across standard assemblies

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection in demanding environments, while the 7/8"-9 UNC coarse thread design ensures rapid installation and superior vibration resistance. The fully threaded configuration maximizes surface contact area, distributing stress evenly across the entire fastener length. With 150,000 psi tensile strength and Rockwell C33 hardness, this industrial fastener maintains structural integrity under extreme loads, making it ideal for construction, manufacturing, and heavy equipment applications where failure is not an option.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances ensuring proper clearance for industrial applications. The 7/8"-9 UNC coarse thread configuration follows standardized inch system measurements with complete threading along the 4 1/2" length. This fastener meets ASME B18.2.1 and SAE J429 specifications, guaranteeing dimensional accuracy and performance consistency. The external hex drive design provides optimal torque transmission, while the zinc yellow-chromate plating offers enhanced surface protection. Manufactured from high-strength steel meeting Grade 8 requirements for superior mechanical properties in critical fastening applications.