S-91239A154 M4 x 25 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in demanding industrial environments.
• Class 10.9 strength grade guarantees high durability and load-bearing capacity for critical assemblies.
• 2.5mm hex drive design allows for secure tool engagement and easy installation with standard hex keys.
• Fully threaded M4 x 0.7mm coarse thread with Class 6g fit ensures quick assembly and strong holding power in various materials.
• Rounded button head profile offers a low-profile, aesthetically pleasing finish while minimizing snagging risks.
• Compliance with ISO 7380, RoHS 3, and REACH ensures adherence to international quality and environmental standards for global supply chain compatibility.

Professional Applications & Engineering Value

This M4 button head screw is engineered to address common industrial challenges such as vibration loosening, corrosion, and high mechanical stress. The black-oxide alloy steel construction provides a robust barrier against rust and wear, making it ideal for machinery, automotive, and electronics assemblies where exposure to harsh conditions is frequent. The fully threaded metric coarse thread design ensures rapid installation and superior grip in soft or hard materials, reducing assembly time while maintaining Class 10.9 strength. With a 2.5mm hex drive, it offers precise torque application, minimizing strip-out risks and enhancing reliability in repetitive maintenance cycles. These features collectively deliver long-term cost savings by lowering replacement frequency and improving operational safety.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including M4 x 0.7mm coarse thread with Class 6g thread fit per ISO metric specifications, ensuring consistent performance and interchangeability. It meets ISO 7380 for dimensional and mechanical requirements, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances. Manufactured from alloy steel with a hardness of Rockwell C32, it supports high-tensile applications while maintaining industry-standard reliability.