S-90505A441 M3 x 4 mm DIN 965 Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior Corrosion Resistance in harsh environments due to 316 Stainless Steel construction, ideal for chemical, marine, and outdoor applications.
• Reliable High-Pressure Sealing up to 6000 psi with an integrated Buna-N rubber O-ring, preventing leaks in fluid and gas systems.
• Broad Temperature Tolerance from -40° to 225° F for the O-ring, ensuring consistent performance in varying thermal conditions.
• Precise Thread Fit with Class 6g tolerance and coarse M3 x 0.5 mm threads for easy installation and secure, vibration-resistant fastening.
• Optimized Head Design featuring an undercut flat head and 90° countersink angle for a flush, low-profile finish that minimizes protrusion.
• Efficient Drive System using a Phillips No. 1 drive for common tool compatibility and quick, straightforward assembly.
• Full Thread Engagement along the 4 mm length for maximum grip strength and uniform load distribution in thin materials.

Professional Applications & Engineering Value

This M3 flat head screw is engineered to address critical sealing and durability challenges in industrial settings. The 316 stainless steel material provides exceptional resistance to corrosion from chemicals, saltwater, and extreme weather, making it ideal for marine equipment, chemical processing systems, and food machinery. The integrated Buna-N rubber O-ring ensures a reliable seal against high-pressure fluids and gases, preventing leaks that can lead to system failures or contamination. With its fully threaded design and Class 6g fit, it offers precise alignment and strong retention in applications like enclosures, panels, and fluid control devices, reducing maintenance needs and enhancing operational safety. The Phillips drive and undercut head further streamline installation, saving time in high-volume assembly lines while maintaining a clean, professional appearance.

Specification Summary & Compliance

This screw adheres to DIN 965 standards for dimensional accuracy, with a Class 6g thread fit ensuring consistent performance in metric assemblies. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances. The specifications include a maximum hole diameter of 3.454 mm and a 90° countersink angle for proper seating, supporting reliable integration in engineered systems.