S-91239A121 M3 x 18 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with Class 10.9 alloy steel construction, providing superior resistance to high-stress applications and reducing fastener failure risks.
• Enhanced corrosion protection from the black-oxide coating, extending service life in demanding industrial environments without compromising performance.
• Reliable torque transmission via the 2 mm hex drive and rounded button head design, ensuring secure installation and minimizing tool slippage during assembly.
• Optimized thread engagement with fully threaded M3 x 0.5 mm coarse pitch and Class 6g fit, delivering consistent clamping force and vibration resistance.
• High mechanical strength supported by 140,000 psi tensile strength and Rockwell C32 hardness, maintaining integrity under heavy loads and repetitive use.
• Broad compatibility with metric systems and ISO 7380 standards, facilitating seamless integration into global manufacturing and machinery designs.
• Environmental compliance meeting RoHS 3 and REACH regulations, ensuring safe usage in regulated industries and reducing ecological impact.

Professional Applications & Engineering Value

Engineered for precision and endurance, these M3 rounded head hex screws address critical industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction, combined with a Class 10.9 strength grade, provides robust performance in high-torque applications like automotive assemblies, machinery frames, and electronic enclosures. The fully threaded coarse pitch design ensures rapid installation and secure fastening in metals and composites, while the rounded button head offers a low-profile, flush fit that minimizes snagging in tight spaces. By adhering to ISO 7380 specifications, these screws deliver consistent dimensional accuracy and reliability, reducing maintenance needs and enhancing operational efficiency in demanding sectors.

Specification Summary & Compliance

This fastener features precise metric threading with M3 x 0.5 mm coarse pitch and Class 6g thread fit for accurate engagement. It complies with ISO 7380 dimensional standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international safety and sustainability requirements.