S-96562A922 4-40 x 1 1/4" ASME B18.6.3 Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure fastening in high-stress environments
• Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
• High-temperature performance with reliable operation from -70° to 250°F without compromising locking capability
• Superior mechanical strength delivering 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Optimized drive efficiency with Phillips No. 1 drive design for secure tool engagement and reduced cam-out
• Precision threading with UNC coarse thread pattern and Class 2A fit ensuring consistent engagement and assembly
• Industry compliance meeting ASME B18.6.3 standards with full RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

These 4-40 UNC nylon patch locking screws provide engineered solutions for vibration-prone industrial environments where fastener security is critical. The permanent nylon patch locking technology creates consistent friction along the threads, preventing loosening under dynamic loads without requiring additional locking components. Manufactured from 18-8 stainless steel with a passivated finish, these fasteners offer superior corrosion resistance in harsh operating conditions while maintaining their mechanical properties across a wide temperature range (-70° to 250°F). The combination of coarse UNC threading with Class 2A fit ensures reliable engagement in various materials, while the rounded pan head design with Phillips drive provides optimal torque transmission and a low-profile installation. Ideal for machinery, electronic enclosures, and automotive assemblies where vibration resistance and environmental durability are paramount.

Specification Summary & Compliance

These rounded head screws feature precision 4-40 UNC coarse threads with Class 2A fit tolerance for consistent assembly performance. The manufacturing process adheres to ASME B18.6.3 specifications for dimensional accuracy and quality assurance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring these fasteners meet current environmental standards for hazardous substance restrictions. The combination of fully threaded design and standardized dimensions guarantees reliable performance in industrial fastener applications.