S-90317A171 M4 x 12 mm ISO 7045 Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Enhanced vibration resistance with integrated internal-tooth lock washer to maintain secure fastening in high-motion environments
• Superior corrosion protection from passivated 18-8 stainless steel construction, ideal for humid or chemically exposed settings
• Reliable drive engagement with Phillips No. 2 drive design, ensuring efficient installation and reduced cam-out risk
• Consistent thread performance through fully threaded Class 6g metric coarse threads for easier alignment and robust holding power
• Optimized load distribution from the rounded pan head design, minimizing surface damage while supporting 70,000 PSI tensile strength
• Durable washer functionality with 410 stainless steel internal-tooth lock washer, providing repeated locking action without degradation
• Broad industrial compliance meeting ISO 7045, RoHS 3, and REACH standards for global quality and environmental safety

Professional Applications & Engineering Value

Engineered for demanding assembly lines, these M4 metric screws address critical challenges in machinery, electronics, and automotive systems where vibration loosening and corrosion compromise longevity. The 18-8 stainless steel core, hardened to Rockwell B70, resists stress cracking under dynamic loads, while the passivated finish adds an extra shield against oxidation in harsh climates. Combined with the internal-tooth lock washer—crafted from 410 stainless—the assembly maintains clamp force despite continuous operational shocks. The fully threaded coarse pitch (0.7mm) and Class 6g tolerance enable quick, precise fitting into diverse substrates, reducing installation errors. Ideal for securing control panels, motor mounts, or conveyor components, these rounded head Phillips screws deliver predictable performance where failure is not an option.

Specification Summary & Compliance

This product adheres to ISO 7045 for pan head screw dimensions and drive compatibility. Threads are manufactured to Metric M4 x 0.7mm coarse pitch with a Class 6g tolerance, ensuring consistent fit in standard tapped holes. All materials and finishes—including the passivated 18-8 stainless steel screw and 410 stainless steel lock washer—comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances for safe industrial and international use.