S-91294A283 M8 x 18 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (120,000 psi) ensures reliable performance in demanding industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh environments.
• High-strength Class 10.9 rating guarantees consistent load-bearing capacity and durability under high stress.
• Precision coarse threading (M8 x 1.25mm) with Class 6g fit allows for quick, secure installation and reduced cross-threading risks.
• Fully threaded design provides maximum grip and uniform clamping force along the entire 18mm length.
• Hex drive (5mm) offers easy, high-torque installation with standard tools, improving assembly efficiency.
• Compliance with DIN 7991/ISO 10642 ensures dimensional accuracy and interchangeability in metric fastener systems.

Professional Applications & Engineering Value

Engineered for high-strength industrial applications, this M8 flat head screw addresses critical needs in machinery, automotive, and structural assemblies where vibration and dynamic loads are common. The black-oxide alloy steel construction combats corrosion, while the Class 10.9 strength grade and Rockwell C32 hardness provide resilience against fatigue and overtightening. Its fully threaded coarse pitch design ensures rapid, secure fastening in coarse-grained materials, minimizing installation time and enhancing joint integrity. The flat head with 90° countersink sits flush for streamlined surfaces, ideal for applications requiring aerodynamic or safety clearances.

Specification Summary & Compliance

This screw features M8 x 1.25mm coarse threads with a Class 6g thread fit for precise metric tolerances, and complies with DIN 7991 / ISO 10642 standards for dimensional consistency. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries.