S-91430A228 M4 x 20 mm DIN 963, ISO 2009 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Superior mechanical strength with a tensile strength of 70,000 psi and Rockwell B80 hardness, providing dependable performance under high-stress conditions.
• Precise and secure fastening achieved with a Class 6g thread fit and coarse 0.7mm pitch, enabling quick assembly and reduced cross-threading risk.
• Flush, professional installation facilitated by the standard 90° countersink angle and flat head design, ideal for applications requiring a smooth surface finish.
• Broad compatibility and compliance with DIN 963 and ISO 2009 standards, ensuring interchangeability and meeting rigorous industrial specifications.
• Environmental and safety assurance through full compliance with RoHS 3 and REACH regulations, making them safe for various manufacturing sectors.
• Versatile drive option with a slotted head, allowing for easy installation and removal using common hand tools.

Professional Applications & Engineering Value

This M4 flat head screw is engineered to address critical challenges in industrial assembly, where corrosion resistance and mechanical integrity are paramount. Manufactured from 18-8 stainless steel with a passivated finish, it effectively combats rust and chemical degradation in demanding environments like machinery, automotive components, and electronic enclosures. The fully threaded design and coarse thread pitch ensure rapid, secure fastening, minimizing installation time while preventing loosening under vibration. Its 90° countersink angle and flat head profile enable seamless integration into surfaces, eliminating protrusions and enhancing safety. Ideal for metric machine screw applications, this fastener delivers consistent performance, reducing maintenance needs and downtime in precision engineering projects.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including a Class 6g thread fit per ISO metric standards and a length of 20 mm. It is manufactured in compliance with DIN 963 (referencing ISO 2009) for flat head screw specifications. The screw fully meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring it is free from hazardous substances and safe for industrial use. This commitment to standards guarantees reliability and interoperability in global supply chains.