S-90505A401 M4 x 25 mm DIN 965 Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with an integrated silicone O-ring that withstands pressures up to 6000 psi, preventing leaks in critical applications.
• Exceptional corrosion resistance due to 316 stainless steel construction, ideal for harsh environments including marine and chemical processing.
• Reliable fastening in high-vibration settings ensured by the coarse M4 x 0.7 mm thread and Class 6g fit, providing a secure, durable hold.
• Streamlined, flush installation with the 90° flat undercut head and Phillips No. 2 drive, allowing for a clean finish and easy assembly.
• Broad temperature compatibility as the silicone O-ring performs reliably from -80° to 400° F, maintaining seal integrity under thermal stress.
• High tensile strength of 70,000 psi for demanding mechanical applications, ensuring the screw withstands significant loads without failure.
• Global compliance and quality assurance through adherence to DIN 965 standards, RoHS 3, and REACH, meeting international regulatory requirements.

Professional Applications & Engineering Value

This M4 flat head screw is engineered to address common industrial challenges such as fluid leakage, corrosion-induced failure, and assembly inefficiency. The 316 stainless steel material offers excellent resistance to chlorides and acidic environments, making it a top choice for marine equipment, chemical processing systems, and food machinery. The combination of a fully threaded design with a coarse metric thread pitch ensures quick installation and robust holding power in substrates like metals and plastics. The integrated silicone rubber O-ring and undercut flat head create a reliable seal that prevents ingress of moisture and contaminants, which is critical in high-pressure applications up to 6000 psi. By utilizing a Phillips drive and standardized DIN 965 dimensions, these screws reduce assembly time and tooling costs, providing consistent performance in automated or manual fastening processes.

Specification Summary & Compliance

This screw features precise metric threading (M4 x 0.7 mm) with a Class 6g tolerance for consistent fit and performance. It is fully threaded and designed with a right-hand thread direction and 90° countersink angle per DIN 965 specifications. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and safe for various industrial and consumer applications.