S-94173A326 3/8"-24 x 4" 12-Point Screws

Key Features & Benefits at a Glance

• Enhanced torque transmission with the 12-point external drive design, allowing for secure tightening in high-stress applications
• Superior corrosion resistance provided by the black-oxide surface treatment, extending service life in harsh industrial environments
• Exceptional mechanical strength from alloy steel construction, rated at 170,000 PSI tensile strength for reliable load-bearing performance
• Precise thread engagement with Class 2A UNF fine threading, ensuring accurate fit and vibration resistance in assembled components
• Integrated flange design eliminates the need for a separate washer, providing increased bearing surface and simplified installation
• Optimized partial threading allows for focused clamping force where needed most in your assembly applications
• Consistent hardness performance at Rockwell C38, maintaining dimensional stability under repeated use and high torque conditions

Professional Applications & Engineering Value

This 12-point screw delivers critical engineering advantages for industrial applications demanding both high torque capability and corrosion resistance. The black-oxide alloy steel construction combined with UNF fine threading addresses common failure points in heavy machinery, automotive assemblies, and structural frameworks where vibration loosening and environmental exposure compromise fastener integrity. The external 12-point drive system provides superior tool engagement compared to standard hex drives, preventing rounding during high-torque applications. The partially threaded design with integrated flange concentrates clamping force precisely where needed, making it ideal for securing brackets, mounts, and structural components that require both precise alignment and robust fastening performance in demanding industrial environments.

Specification Summary & Compliance

This 3/8"-24 UNF screw features Class 2A thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. The manufacturing process adheres to industry standards for inch fasteners with controlled Rockwell C38 hardness and 170,000 PSI tensile strength verification. The black-oxide surface treatment provides corrosion protection while maintaining compliance with industrial fastener specifications. The product meets relevant industry standards for heavy-duty industrial fasteners and is suitable for applications requiring reliable performance under demanding mechanical stress conditions.