S-91029A103 M8 x 20 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws
Extreme-Strength Metric Class12.9 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh or outdoor environments.
- High hardness rating (Rockwell C39) provides excellent wear resistance and durability under repetitive loads.
- Fully threaded design offers consistent clamping force along the entire length for secure fastening.
- Coarse thread pitch (1.25mm) allows for quicker installation and reduced cross-threading risks in industrial settings.
- External hex drive enables easy installation and removal with standard tools, improving assembly efficiency.
- Compliance with ISO 4017/DIN 933 guarantees dimensional accuracy and interchangeability for global engineering projects.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these M8 hex head screws deliver unmatched reliability where failure is not an option. The Class 12.9 steel construction, combined with zinc yellow-chromate plating, provides exceptional resistance to both mechanical stress and environmental corrosion. This makes them ideal for machinery assembly, automotive components, and structural frameworks exposed to vibration and harsh conditions. The fully threaded coarse pitch design ensures rapid installation and superior holding power, while the external hex drive accommodates high-torque applications without stripping. By meeting ISO 4017/DIN 933 specifications, these screws offer guaranteed performance and compatibility in global supply chains.
Specification Summary & Compliance
This M8 x 1.25mm metric screw features a Class 6h thread fit for precise engagement and a 20mm length with full threading. Manufactured to ISO 4017/DIN 933 standards, it ensures dimensional accuracy and interchangeability. The zinc yellow-chromate plating provides RoHS and REACH compliance for environmental safety, while the Class 12.9 strength rating confirms adherence to high-performance mechanical requirements for industrial use.
