S-96562A918 4-40 x 7/16" ASME B18.6.3 Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch locking that maintains integrity across -70° to 250° F temperature ranges
• Superior corrosion protection through 18-8 stainless steel construction and passivated surface treatment
• High-strength performance delivering 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Reliable thread engagement with fully threaded UNC coarse threads and Class 2A fit for consistent installation
• Optimized drive efficiency featuring Phillips No. 1 drive style combined with rounded pan head design
• Industry compliance assurance meeting ASME B18.6.3 specifications and environmental regulations
• Secure fastening solution with integrated thread locker eliminating the need for additional locking components

Professional Applications & Engineering Value

These 4-40 UNC nylon patch locking screws address critical vibration-induced loosening challenges in industrial equipment, electronic enclosures, and machinery assemblies. The permanent nylon patch locking technology creates consistent friction resistance without compromising the 18-8 stainless steel material integrity or passivated finish corrosion protection. Engineered with coarse threads and Class 2A fit, these fully threaded screws provide reliable engagement in various materials while the rounded pan head with Phillips drive ensures efficient installation in space-constrained applications. The combination of 60,000 psi tensile strength and wide temperature tolerance makes these locking fasteners ideal for automotive, aerospace, and industrial manufacturing where vibration resistance and material compatibility are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 standards with Class 2A thread fit and UNC coarse threading. Features include 4-40 thread size, 7/16" length, and full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The nylon patch locking system maintains performance across specified temperature ranges while the passivated finish on 18-8 stainless steel ensures corrosion resistance in demanding environments.