S-90344A139 M3 x 6 mm ASTM A574 Socket Head Screws with Flat Washer
Socket Head Screws with Flat Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
- Superior load distribution thanks to the integrated flat washer, reducing surface pressure and preventing material damage.
- High tensile strength of 170,000 psi ensures reliable performance under heavy mechanical stress and vibration.
- Precise Class 6g thread fit guarantees smooth assembly and secure fastening in metric applications.
- Durable Rockwell C39 hardness provides excellent wear resistance and long-term fastener integrity.
- Convenient 2.5mm hex drive allows for easy installation and removal with standard tools, improving maintenance efficiency.
- Full compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
This M3 socket head cap screw with integrated flat washer is engineered to address critical challenges in precision assembly and heavy-duty applications. The black-oxide alloy steel construction offers superior corrosion resistance, making it ideal for machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The coarse metric thread (M3 x 0.5mm pitch) and Class 6g thread fit ensure quick, reliable fastening with minimal risk of cross-threading, reducing installation time and improving production line efficiency. Combined with high tensile strength and the washer's load-spreading capability, it prevents joint loosening under dynamic loads, enhancing the durability of assembled components in industrial settings.
Specification Summary & Compliance
This fastener features a metric M3 x 0.5mm coarse thread with Class 6g tolerance for precise fit, and is fully threaded for consistent engagement. It meets ASTM A574 specifications for high-strength socket head cap screws, ensuring material and manufacturing consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for use in regulated industries worldwide.
