S-91239A442 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 corrosion resistance with black-oxide coating on alloy steel, ideal for harsh industrial environments
- High tensile strength of 140,000 PSI ensures reliable performance in demanding heavy-duty applications
- Class 10.9 strength grade provides superior load-bearing capacity and fatigue resistance
- Rockwell C32 hardness maintains structural integrity under repeated stress and vibration
- ISO 7380 compliant design guarantees precise dimensional accuracy and international compatibility
- Hex button head design allows for easy installation with standard 5mm hex tools in confined spaces
- Fully threaded M8 coarse pitch enables faster assembly and superior holding power in various materials
Professional Applications & Engineering Value
These M8 hex button head screws deliver critical engineering solutions where high-strength fastening meets environmental durability. The black-oxide alloy steel construction provides superior protection against corrosion in manufacturing, automotive, and machinery applications where moisture and chemicals are present. With Class 10.9 strength rating and 140,000 PSI tensile strength, these fasteners prevent joint failure in high-vibration environments. The fully threaded coarse pitch design ensures rapid installation and maximum thread engagement, while the rounded button head profile offers a flush finish that eliminates snagging hazards in moving equipment. Engineered to ISO 7380 standards, these metric screws provide reliable performance in precision assemblies where dimensional consistency is paramount.
Specification Summary & Compliance
This M8 x 1.25mm pitch fastener features Class 6g thread fit tolerance for precise engagement and meets ISO 7380 manufacturing specifications. The 40mm fully threaded design with right-hand coarse threading ensures optimal performance in industrial applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and restricted substance control for global industrial use.
