S-91304A138 M6 x 40 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 tensile strength with Class 10.9 rating (120,000 psi) for reliable performance in demanding applications
- Enhanced corrosion resistance through blue-dyed zinc plating that protects against environmental degradation
- Precision threading with M6 x 1mm coarse pitch and Class 6g fit ensures smooth installation and secure fastening
- Optimized drive engagement with 4mm hex drive provides superior torque transmission and prevents stripping
- Durable material construction using alloy steel with Rockwell C32 hardness for long-term reliability
- Flush mounting capability with standard 90° countersink angle for clean, professional finishes
- Partial threading design allows for precise clamping force control in various material thicknesses
Professional Applications & Engineering Value
These M6 flat head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The blue-dyed zinc-plated alloy steel construction provides superior protection against environmental factors, while the Class 10.9 strength rating ensures reliable performance under heavy loads and vibration. The 1mm coarse pitch threading enables quick installation and secure fastening in various materials, from machinery components to structural assemblies. The 4mm hex drive and standard flat head profile allow for flush mounting in countersunk applications, making them ideal for automotive, industrial equipment, and manufacturing applications where both aesthetics and performance matter. The partially threaded design provides optimal clamping force distribution, preventing material damage while maintaining joint integrity.
Specification Summary & Compliance
Manufactured to precise metric dimensions with Class 6g thread fit tolerance and 40mm length specification. These flat head screws comply with DIN 7991 / ISO 10642 standards for dimensional accuracy and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory adherence for industrial applications worldwide.
