S-92224A111 4-40 x 3/16" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide steel finish for extended service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under significant mechanical stress and vibration
• Class 2A thread fit provides optimal assembly clearance while maintaining secure fastening integrity
• Rockwell B70 hardness rating delivers exceptional durability and resistance to wear during repeated installations
• Fully threaded design maximizes engagement surface area for superior holding power across the entire fastener length
• Phillips No. 1 drive system enables efficient installation with standard industrial tools while minimizing cam-out risk
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory adherence for global applications

Professional Applications & Engineering Value

These 4-40 UNC coarse thread screws with black oxide steel construction provide critical solutions for industrial assembly challenges where corrosion resistance and mechanical reliability are paramount. The rounded pan head profile combined with Phillips drive facilitates quick installation in confined spaces while maintaining a low-profile appearance. The coarse thread pitch ensures rapid assembly in various materials, reducing production time without compromising joint integrity. Engineered to withstand vibration and mechanical stress in industrial equipment, machinery, and electronic enclosures, these screws maintain consistent performance through repeated maintenance cycles. The fully threaded right-hand design offers maximum thread engagement, making them ideal for applications requiring uniform clamping force distribution across the entire fastener length.

Specification Summary & Compliance

This 4-40 UNC screw features precise Class 2A thread fit per ASME B18.6.3 specifications, ensuring dimensional accuracy and interchangeability. The coarse thread series provides optimal performance in most industrial materials. Manufacturing complies with ASME B18.6.3 standards for dimensional consistency and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for global market acceptance. The black oxide surface treatment enhances corrosion resistance while maintaining the base material's mechanical properties.