S-91239A140 M4 x 8 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Class 10.9 high-strength rating and Rockwell C32 hardness ensure reliable performance under heavy loads and vibration, reducing replacement frequency.
• Corrosion Resistance: Black-oxide finish on alloy steel provides enhanced protection against rust and wear in harsh industrial environments.
• Secure Installation: 2.5mm hex drive design offers superior torque transmission and minimizes stripping for consistent, tight fastening.
• Wide Compatibility: Fully threaded M4 coarse pitch (0.7mm) with Class 6g fit ensures easy alignment and strong holding power in various materials.
• Streamlined Profile: Button head design with rounded profile reduces snagging risks and provides a flush finish for safety and aesthetics.
• Regulatory Assurance: Compliance with ISO 7380, RoHS 3, and REACH standards guarantees product safety and environmental responsibility.
• High Tensile Strength: 140,000 psi tensile strength supports demanding applications, enhancing structural integrity and load-bearing capacity.

Professional Applications & Engineering Value

Engineered for precision and reliability, this M4 button head screw addresses common industrial challenges such as component loosening and corrosion-induced failure. The black-oxide alloy steel construction, combined with a Class 10.9 strength grade, ensures longevity in high-stress environments like machinery assembly, automotive systems, and electronic enclosures. Its fully threaded metric coarse pitch design facilitates quick installation and robust clamping force, while the 2.5mm hex drive allows for efficient torque application without slippage. Ideal for applications requiring a low-profile head, this screw minimizes protrusion risks and maintains assembly integrity, making it a trusted choice for engineers seeking ISO 7380 compliant fasteners that meet rigorous performance and regulatory standards.

Specification Summary & Compliance

This fastener adheres to precise dimensional tolerances, including Class 6g thread fit and metric coarse thread specifications (M4 x 0.7mm). It meets ISO 7380 manufacturing standards for consistent quality and performance. Additionally, the product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free from hazardous substances and aligns with global environmental regulations for safe industrial use.