S-91290A133 M20 x 85 mm DIN 912 Alloy Steel Socket Head Screws
Alloy Steel Socket 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 of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior hardness (Rockwell C37) provides excellent wear resistance and longevity, minimizing maintenance needs in demanding environments.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in various industrial conditions.
- Class 12.9 strength rating guarantees high load-bearing capacity, ideal for critical assemblies requiring maximum reliability.
- Partially threaded design with M20x2.5 coarse thread allows for secure fastening and easy alignment in coarse-thread applications.
- Hex socket drive (17mm) enables high-torque installation with standard tools, facilitating efficient assembly and disassembly.
- Compliance with DIN 912, RoHS 3, and REACH ensures adherence to international standards and environmental regulations, supporting global project requirements.
Professional Applications & Engineering Value
This M20 socket head cap screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction combined with a Class 12.9 strength class provides robust performance in heavy machinery, automotive systems, and structural frameworks. Its coarse metric thread (M20x2.5) ensures quick assembly and strong holding power, while the partially threaded rod design optimizes clamp load distribution. The hex drive style allows for precise torque application, making it suitable for high-stress environments where reliability is critical. These features collectively enhance operational safety and reduce downtime in professional settings.
Specification Summary & Compliance
This screw features a thread fit of Class 5g6g per ISO standards, ensuring precise dimensional accuracy. It complies with DIN 912 for socket head cap screws and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for regulated industries. The specifications include a minimum thread length of 52mm and a total length of 85mm, designed for consistent performance in metric fastener applications.
