S-92224A118 4-40 x 5/8" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide steel finish, extending service life in demanding industrial environments
• Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable, vibration-resistant fastening
• Optimized drive engagement through Phillips No. 1 drive design, reducing cam-out and ensuring efficient installation
• Enhanced thread engagement with fully threaded UNC coarse pattern and Class 2A fit for secure connections in various materials
• Streamlined assembly process with standard pan head profile providing consistent seating and uniform torque distribution
• Broad compatibility with 4-40 UNC thread specifications, making them ideal for replacement and OEM applications
• Regulatory confidence through compliance with ASME B18.6.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

These 4-40 UNC coarse thread pan head screws deliver critical performance advantages in industrial fastening scenarios where reliability is paramount. The black oxide steel construction provides essential corrosion protection while maintaining the 60,000 psi tensile strength needed for high-stress applications. The fully threaded design ensures maximum thread engagement across the entire 5/8" length, preventing loosening under vibration and thermal cycling. The Phillips No. 1 drive offers familiar, efficient installation while the standard pan head profile distributes clamping force evenly. These screws are particularly valuable in electronics enclosures, machinery assemblies, and automotive components where Class 2A thread fit guarantees consistent performance and interchangeability.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit per UNC specifications, ensuring reliable engagement and interchangeability. These screws conform to ASME B18.6.3 mechanical and dimensional requirements, guaranteeing consistent quality and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. The black oxide steel construction delivers specified Rockwell B70 hardness and 60,000 psi tensile strength for dependable performance in industrial fastening applications.