S-96562A106 4-40 x 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 ensures reliable performance in dynamic environments from -70° to 250° F
• Superior corrosion resistance from 18-8 Stainless Steel construction with passivated finish for extended service life in harsh conditions
• High-strength durability with 60,000 psi tensile strength and Rockwell B70 hardness withstands demanding mechanical stresses
• Secure fastening engagement through Class 2A thread fit and coarse UNC threading for quick installation and vibration resistance
• Industry-standard compatibility meeting ASME B18.6.3 specifications ensures reliable interchangeability and quality
• Enhanced drive stability with Phillips No. 1 drive and rounded pan head design prevents cam-out during installation
• Environmental compliance with RoHS 3 and REACH regulations for safe use across regulated industries

Professional Applications & Engineering Value

These 4-40 UNC nylon patch locking screws solve critical vibration-induced loosening challenges in industrial assemblies. The permanent nylon patch locking mechanism creates consistent friction along the coarse threads, maintaining clamp force where conventional fasteners fail. Manufactured from 18-8 Stainless Steel with passivated finish, they provide exceptional corrosion resistance for outdoor equipment, marine components, and chemical processing applications. The fully threaded design and Class 2A thread fit ensure precise engagement in tapped holes, while the rounded pan head with Phillips drive offers streamlined installation in confined spaces. Ideal for securing electronic enclosures, machinery guards, and automotive subsystems where thermal cycling and vibration demand reliable locking fasteners.

Specification Summary & Compliance

This rounded head screw features precise Class 2A thread fit with 4-40 UNC coarse threading and 1/4" length. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring restricted substance adherence. The nylon patch locking technology maintains integrity across the specified -70° to 250° F temperature range while the fully threaded construction provides consistent engagement depth.