S-91306A778 M8 x 40 mm ISO 7380 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional strength for demanding applications with Class 10.9 rating and 140,000 psi tensile strength, ensuring reliable performance under high stress.
- Superior corrosion resistance from zinc-plated alloy steel, extending service life in harsh industrial environments.
- Optimized torque transmission and easy installation thanks to the hex drive design and fully threaded M8 coarse thread for quick assembly.
- High durability and wear resistance with Rockwell C32 hardness, maintaining integrity in repetitive or heavy-duty use.
- Secure and precise fastening with Class 6g thread fit and standard rounded button head, providing a flush finish and reduced snagging.
- Compliance with international standards including ISO 7380, ensuring consistent quality and interchangeability in global projects.
- Environmentally safe operation by meeting RoHS 3 and REACH regulations, supporting sustainable manufacturing practices.
Professional Applications & Engineering Value
This M8 rounded head screw is engineered to address common industrial challenges, such as vibration loosening and corrosion-induced failure. Made from zinc-plated alloy steel, it offers enhanced protection against rust and chemical exposure, making it ideal for outdoor machinery, automotive assemblies, and structural frameworks. The coarse thread with 1.25mm pitch and fully threaded design ensures rapid installation and strong grip in materials like metal and plastic, reducing assembly time and labor costs. With a hex drive for high torque application, it prevents stripping and provides reliable fastening in high-vibration environments, supporting long-term operational stability and minimizing maintenance downtime in industrial fastening applications.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including M8 thread size with 1.25mm coarse pitch and Class 6g thread fit for accurate engagement. It complies with ISO 7380 for consistent manufacturing quality, along with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.
