S-91304A115 M4 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 capability with Class 10.9 strength grade and 120,000 psi tensile strength for reliable performance in demanding applications.
- Superior corrosion resistance from blue-dyed zinc-plated alloy steel, extending service life in harsh industrial environments.
- Precise and secure fastening ensured by M4 coarse threading (0.7mm pitch) with Class 6g fit, reducing cross-threading risks.
- Efficient installation and removal with 2.5mm hex drive, allowing high torque application without slippage.
- Flush surface finish due to standard 90° flat head profile, ideal for applications requiring smooth, unobstructed surfaces.
- High durability and wear resistance backed by Rockwell C32 hardness, maintaining integrity under repetitive stress.
- Global compliance and reliability meeting DIN 7991/ISO 10642 standards, RoHS 3, and REACH regulations for safe international use.
Professional Applications & Engineering Value
These M4 flat head screws are engineered to address critical fastening challenges in heavy-duty industrial applications such as machinery assembly, automotive components, and structural frameworks. The blue-dyed zinc-plated alloy steel construction provides an effective barrier against oxidation and chemical exposure, significantly reducing maintenance costs and downtime. With a fully threaded design and coarse thread pitch, they offer rapid installation and superior holding power in materials prone to vibration loosening. The Class 10.9 strength rating and precise metric threading ensure consistent clamp load distribution, making them ideal for high-stress environments where fastener failure is not an option. Their compliance with DIN 7991/ISO 10642 guarantees dimensional accuracy and interoperability with standardized components.
Specification Summary & Compliance
This fastener features M4 x 0.7mm coarse threads with a Class 6g tolerance for precise fit, and is manufactured to DIN 7991/ISO 10642 specifications. It maintains a 20mm length and 90° countersink angle for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance-free composition.
