S-92620A918 7/8"-9 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load Capacity - With 150,000 psi tensile strength and Rockwell C33 hardness, these screws withstand extreme mechanical stresses without failure.
• Superior Corrosion Protection - Zinc yellow-chromate plating provides excellent resistance to rust and environmental degradation in harsh industrial settings.
• Optimized Assembly Efficiency - Coarse UNC threads and Class 2A fit enable quick installation while maintaining secure fastening in high-vibration applications.
• Heavy-Duty Construction - Grade 8 classification ensures reliable performance in critical structural and machinery applications requiring high strength-to-weight ratios.
• Full Thread Engagement - Completely threaded 6" length allows for maximum adjustability and load distribution across the entire fastener.
• Standardized Compatibility - Manufactured to ASME B18.2.1 and SAE J429 specifications for guaranteed interchangeability and engineering consistency.
• Secure Torque Transfer - External hex drive design with 1 5/16" head width provides positive tool engagement for high-torque applications.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The 7/8"-9 UNC coarse thread configuration combined with Class 2A fit ensures rapid assembly in structural steel, heavy machinery, and construction equipment while maintaining vibration resistance. The zinc yellow-chromate plating provides critical corrosion protection in outdoor environments and industrial settings where moisture and chemicals are present. With full threading along the 6" length, these fasteners offer maximum flexibility in joint design and load distribution, making them ideal for demanding applications in construction, mining equipment, and industrial machinery where 150,000 psi tensile strength is required for safety-critical connections.

Specification Summary & Compliance

These hex head screws feature precise Class 2A thread fit with 7/8"-9 UNC coarse threads and comply with ASME B18.2.1 and SAE J429 specifications. The manufacturing process ensures dimensional accuracy for reliable performance in industrial applications. The zinc yellow-chromate plating meets industry standards for corrosion protection while the Grade 8 classification guarantees consistent mechanical properties including the specified 150,000 psi tensile strength and Rockwell C33 hardness.