S-93395A277 M4 x 40 mm DIN 7991 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and passivated finish, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under demanding mechanical loads.
• Precise Class 6g thread fit provides consistent engagement and reduces the risk of cross-threading.
• Fully threaded M4 x 0.7mm coarse pitch design offers excellent holding power and faster installation.
• 2.5mm hex drive and flat head with 90° countersink allows for flush mounting and secure, tamper-resistant fastening.
• Compliance with DIN 7991 standards guarantees dimensional accuracy and interchangeability.
• RoHS 3 and REACH compliant for safe use in regulated industries and environmentally sensitive applications.

Professional Applications & Engineering Value

These M4 flat head screws are engineered to address common challenges in industrial assembly, such as corrosion in marine or chemical processing environments. Made from 316 stainless steel with a passivated finish, they resist oxidation and chemical attack, extending service life. The fully threaded coarse metric thread and Class 6g fit ensure quick, reliable fastening in metals and plastics, reducing installation time. The hex drive and flat head profile provide a low-profile, secure fit, ideal for machinery, enclosures, and structural components where vibration resistance and flush surfaces are critical.

Specification Summary & Compliance

This screw meets DIN 7991 specifications, with M4 x 0.7mm coarse thread, Class 6g thread fit, and a head diameter tolerance of -0.36 to 0 mm. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.