S-96562A605 4-40 x 3/16" ASME B18.6.3, IFI 124 Standards Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch locking, maintaining secure fastening in temperatures from -55° to 120° F
• Superior corrosion resistance through 18-8 Stainless Steel construction and passivated finish for extended service life in harsh environments
• High-strength performance delivering 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Reliable thread engagement with UNC coarse threading and Class 2A fit ensuring consistent installation and load distribution
• Secure drive compatibility featuring Phillips No. 1 drive for controlled torque application and reduced cam-out risk
• Optimized head design with rounded pan profile providing ample bearing surface while maintaining low profile clearance
• Full thread coverage across the 3/16" length for maximum grip and holding power in various material thicknesses

Professional Applications & Engineering Value

These 4-40 UNC nylon patch locking screws address critical vibration-induced loosening challenges in industrial assemblies. The permanent nylon patch thread locker creates consistent friction without requiring separate locking components, simplifying inventory and installation processes. Manufactured from 18-8 Stainless Steel with passivated finish, they resist corrosion in moisture-prone environments while maintaining mechanical integrity. The coarse UNC threading ensures rapid installation in various materials, while the rounded pan head with Phillips drive provides reliable torque transfer without specialized tools. Ideal for electronics enclosures, machinery guards, and automotive components where vibration resistance and corrosion protection are paramount, these fully threaded fasteners deliver engineering reliability across temperature cycles from -55° to 120° F.

Specification Summary & Compliance

These locking screws feature Class 2A thread fit per UNC standards with 4-40 coarse threading and full thread coverage across the 3/16" length. Manufacturing complies with ASME B18.6.3 specifications (IFI 124 Standards) ensuring dimensional precision and performance consistency. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for global industrial applications.