S-94967A397 1/4"-20 x 1 1/2" ASME B18.2.1, ASTM B117, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black protective coating, extending service life in harsh environments
• High-strength Grade 5 construction delivers 120,000 PSI tensile strength for demanding applications
• Precise Class 2A thread fit ensures smooth installation and reliable engagement
• Coarse UNC threading provides faster assembly and reduced cross-threading risk
• External hex drive design allows for high-torque installation with standard tools
• Full threading along 1-1/2" length maximizes grip range and adjustment flexibility
• Rockwell C25 hardness maintains structural integrity under heavy loads

Professional Applications & Engineering Value

These Grade 5 hex head screws with black corrosion-resistant coating solve critical industrial challenges where environmental exposure and structural integrity are paramount. The UNC coarse thread configuration combined with Class 2A thread fit ensures rapid, reliable installation in manufacturing equipment, structural frameworks, and machinery assembly. The external hex drive accommodates high torque requirements while the fully threaded design provides consistent clamping force across the entire 1-1/2" length. Engineered for heavy-duty applications, these screws deliver exceptional performance in construction, automotive, and industrial equipment where corrosion resistance and 120,000 PSI tensile strength are essential for long-term reliability.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 specifications with Class 2A thread fit tolerance for precision engagement. Complies with ASTM B117 salt spray testing and SAE J429 Grade 5 mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for restricted substances.