S-90403A837 10-32 x 1" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated internal-tooth lock washer that maintains secure fastening in high-stress environments
• Enhanced corrosion protection through zinc-plated steel construction, ensuring long-term reliability in harsh industrial settings
• High tensile strength of 60,000 psi combined with Rockwell B69 hardness for exceptional load-bearing capacity and durability
• Precise Class 2A thread fit with 10-32 UNF fine threading for smooth installation and reliable engagement in tapped holes
• Optimized drive efficiency with Phillips No. 2 head design that prevents cam-out and allows for consistent torque application
• Full threading along 1" length provides maximum grip and holding power across the entire fastener engagement area
• Right-hand thread direction with standard pan head profile for familiar installation and compatibility with common tools

Professional Applications & Engineering Value

These zinc-plated steel screws with 10-32 UNF fine threading are engineered to solve critical vibration-induced loosening problems in industrial assemblies. The internal-tooth lock washer creates permanent resistance against rotational forces, making them ideal for machinery, automotive components, and electronic enclosures where constant motion or impact occurs. The pan head design with Phillips drive ensures flush mounting while providing sufficient bearing surface for secure fastening. With fully threaded construction and Class 2A thread fit, these screws deliver precise alignment and maximum thread engagement, preventing strip-out in soft materials and maintaining joint integrity under dynamic loads. The combination of 60,000 psi tensile strength and corrosion-resistant zinc plating makes these fasteners suitable for demanding applications across manufacturing, aerospace, and heavy equipment sectors.

Specification Summary & Compliance

This 1" length screw features precision 10-32 UNF fine threads with Class 2A thread fit tolerance for consistent performance. Manufacturing complies with ASME B18.13 specifications for dimensional accuracy and quality assurance. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety, ensuring environmental responsibility and workplace safety standards.