S-91239A151 M4 x 18 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 tensile strength of 140,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure
- Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh industrial environments
- Easy installation and removal with the 2.5 mm hex drive design, minimizing assembly time and tool slippage
- High-strength Class 10.9 rating guarantees consistent performance for critical mechanical assemblies
- Full threading with coarse 0.7mm pitch provides faster installation and superior holding power in various materials
- Precision Class 6g thread fit ensures smooth engagement and reliable fastening in metric applications
- Compact button head profile offers a low-profile finish while maintaining substantial bearing surface
Professional Applications & Engineering Value
These M4 button head screws deliver exceptional engineering value through their black-oxide alloy steel construction and Class 10.9 strength rating, making them ideal for demanding applications in machinery, automotive assemblies, and industrial equipment. The combination of 140,000 psi tensile strength and Rockwell C32 hardness ensures they withstand vibration and dynamic loads without compromising integrity. The fully threaded coarse pitch design allows for rapid installation in time-sensitive production environments, while the hex drive provides secure tool engagement that prevents stripping during high-torque applications. The low-profile rounded head design is particularly valuable in applications where clearance is limited but high clamping force is required.
Specification Summary & Compliance
This metric fastener features precise M4 x 0.7mm thread dimensions with Class 6g tolerance for consistent fitment. Manufactured to ISO 7380 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The 18mm length and fully threaded configuration provide versatile application possibilities while maintaining the high-strength characteristics of Class 10.9 alloy steel fasteners.
