S-92620A807 5/8"-11 x 2 1/4" 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 demanding applications
• Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
• Enhanced durability and wear resistance from Rockwell C33 hardness rating for extended service life
• Quick installation and removal with external hex drive design providing excellent torque transmission
• Secure fastening in various materials thanks to 5/8"-11 UNC coarse threads that resist loosening under vibration
• Full-length threading ensures maximum grip and engagement throughout the entire 2 1/4" length
• Precision manufacturing with Class 2A thread fit guarantees consistent performance and compatibility

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw delivers exceptional performance where failure is not an option. The steel construction combined with zinc yellow-chromate plating creates a robust barrier against corrosion, making it ideal for outdoor equipment, machinery assembly, and structural applications exposed to moisture and chemicals. The 5/8"-11 UNC coarse threads provide superior holding power in both soft and hard materials, while the fully threaded design ensures maximum engagement in thick sections. The external hex drive allows for high-torque installation with standard tools, reducing assembly time and labor costs in manufacturing, construction, and maintenance operations where reliability and quick service access are critical requirements.

Specification Summary & Compliance

This heavy-duty hex screw features precision Class 2A thread fit with UNC coarse threading (5/8"-11) and right-hand thread direction. Manufactured to exacting standards, the fastener complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. The zinc yellow-chromate plating provides corrosion protection while maintaining the 150,000 psi tensile strength and Rockwell C33 hardness required for critical applications. All components meet industry standards for quality and performance in industrial fastening systems.