S-91304A153 M8 x 20 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head 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 load-bearing capacity with Class 10.9 strength rating and 120,000 psi tensile strength for demanding industrial applications
- Superior corrosion resistance through blue-dyed zinc plating that provides both protection and visual identification
- Optimal thread engagement with M8 coarse pitch (1.25mm) and Class 6g fit ensuring reliable fastening in various materials
- Secure installation and removal via 5mm hex drive that prevents cam-out and allows high torque application
- Flush mounting capability with standard 90° countersink angle for smooth surface finishes in assembled products
- Full-thread design advantage providing maximum grip length and uniform stress distribution along the entire 20mm length
- Consistent performance assurance through compliance with DIN 7991/ISO 10642 manufacturing standards
Professional Applications & Engineering Value
These Class 10.9 metric flat head screws deliver critical performance in heavy-duty assembly applications where vibration resistance and structural integrity are paramount. The blue-dyed zinc-plated alloy steel construction provides both corrosion protection and part identification, streamlining inventory management in manufacturing environments. The M8 coarse thread with 1.25mm pitch ensures rapid installation and superior holding power in metals, plastics, and composite materials. The fully threaded design maximizes engagement depth, while the hex drive accommodates high-torque applications without stripping. Ideal for machinery, automotive components, and structural frameworks, these flat head screws solve common engineering challenges including space constraints, vibration loosening, and corrosion-induced failure.
Specification Summary & Compliance
This M8 x 1.25mm flat head screw features precise Class 6g thread fit tolerance and standardized 90° countersink angle per DIN 7991/ISO 10642 specifications. The fastener maintains 20mm length with fully threaded configuration and right-hand thread direction. Manufacturing compliance includes adherence to DIN 7991/ISO 10642 standards, while environmental regulations are met through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring suitability for global industrial applications.
