S-96562A921 4-40 x 1" ASME B18.6.3 Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Secure vibration-resistant locking with nylon patch thread locker that maintains integrity across a wide temperature range from -70° to 250°F
• Superior corrosion resistance through 18-8 stainless steel construction with passivated finish for extended service life in harsh environments
• High-strength performance delivering 60,000 psi tensile strength with Rockwell B70 hardness for demanding applications
• Reliable thread engagement with Class 2A thread fit and UNC coarse threading ensuring consistent fastening performance
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and quality assurance
• Easy installation and removal with Phillips No. 1 drive and rounded pan head design for efficient assembly operations
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These 4-40 UNC nylon patch locking screws provide critical vibration resistance in industrial assemblies where loosening under dynamic loads is a primary concern. The nylon patch thread locker creates consistent friction without compromising the 18-8 stainless steel material integrity, offering reusable locking capability that outperforms chemical adhesives. The passivated finish enhances corrosion resistance in moisture-prone environments, while the coarse UNC threading and Class 2A fit ensure reliable engagement in various materials. Ideal for electronic enclosures, machinery guards, and automotive components, these fully threaded pan head screws deliver engineering-grade fastening solutions with predictable performance across temperature extremes from -70° to 250°F.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precise dimensional accuracy. Features 4-40 UNC coarse threads with right-hand direction and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated applications. The 18-8 stainless steel construction with passivated finish provides consistent mechanical properties including 60,000 psi tensile strength and Rockwell B70 hardness.