S-96562A110 4-40 x 1/2" ASME B18.6.3 Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch thread locker that maintains secure fastening in high-stress environments
• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish for extended service life
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Wide temperature tolerance from -70° to 250° F, ensuring reliable performance across diverse operating conditions
• Quick installation efficiency with Phillips drive and coarse UNC threading for faster assembly in industrial settings
• Precise thread engagement through Class 2A thread fit and fully threaded design for consistent clamping force
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for vibration-resistant applications where secure fastening is critical, these 18-8 stainless steel screws with permanent nylon patch locking provide reliable solutions for machinery, electronics, and industrial equipment. The combination of coarse UNC threading and Class 2A thread fit ensures rapid installation while maintaining precise tolerance control. The passivated finish enhances corrosion resistance in harsh environments, while the pan head design with Phillips drive offers optimal torque transmission and flush mounting capabilities. These rounded head screws deliver exceptional value in applications requiring temperature stability from -70° to 250° F, making them ideal for automotive, aerospace, and manufacturing sectors where vibration loosening compromises assembly integrity.

Specification Summary & Compliance

This 4-40 UNC screw features precise Class 2A thread fit with coarse threading and full threading along the 1/2" length. Manufactured to ASME B18.6.3 specifications with complete compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The mechanical properties include 60,000 psi tensile strength and Rockwell B70 hardness, ensuring consistent performance across industrial applications while meeting rigorous quality and safety requirements.