S-93395A573 M4 x 50 mm DIN 7991, ISO 10642 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life
• High-strength fastening with 70,000 psi tensile strength, providing reliable clamping force and joint integrity
• Precise thread engagement with Class 6g fit and coarse pitch (0.7 mm), ensuring easy installation and vibration resistance
• Flush, low-profile installation with standard 90° flat head and partial threading, minimizing protrusion in countersunk applications
• Secure, slip-resistant driving with internal hex drive (2.5 mm), allowing for high torque application and reduced tool cam-out
• Guaranteed dimensional consistency with head diameter tolerance of 0 to 0.96 mm, ensuring uniform performance in automated or high-volume assembly
• Full regulatory compliance with RoHS 3 and REACH, making them safe for use in regulated industries and international markets

Professional Applications & Engineering Value

This M4 flat head screw is engineered to address critical challenges in industrial assembly, where corrosion resistance, precise fit, and reliable performance are paramount. The 316 stainless steel material, enhanced by a passivated finish, provides exceptional protection against chemicals, moisture, and salt spray, making these metric screws ideal for marine, chemical processing, and food-grade equipment. The coarse thread design and Class 6g thread fit facilitate quick installation and maintain clamp load under dynamic stresses, reducing the risk of loosening in machinery and structural frameworks. With a 90° countersink angle and partial threading, the screw sits flush with surfaces, preventing snagging and improving aesthetics in consumer products, enclosures, and precision instruments. The hex drive ensures efficient torque transfer, speeding up assembly lines while minimizing wear on driving tools.

Specification Summary & Compliance

This screw adheres to DIN 7991 / ISO 10642 standards, ensuring dimensional accuracy and interchangeability. Thread specifications include M4 x 0.7 mm coarse pitch, right-hand direction, and Class 6g thread fit per ISO metric tolerances. The head diameter is 8 mm with a tolerance of 0 to 0.96 mm, and the minimum thread length is 14 mm. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and globally regulated applications.