S-91280A171 M5 x 55 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Medium-Strength Metric Class 8.8 Steel Hex 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
- Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
- High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibrations
- Class 8.8 strength grade provides excellent durability for demanding mechanical applications
- Fully threaded design offers maximum grip and uniform clamping force along the entire length
- External hex drive and hex head allow for easy installation with standard tools and high torque application
- Coarse M5 x 0.8 mm thread enables quick assembly and reduced cross-threading risks
- Rockwell C21 hardness maintains thread integrity and resists wear over repeated use
Professional Applications & Engineering Value
This M5 x 55mm hex head screw is engineered to address critical fastening challenges in industrial settings. Made from Class 8.8 steel, it delivers high tensile strength and fatigue resistance, ideal for machinery, automotive assemblies, and structural frameworks where vibration and dynamic loads are common. The zinc plating provides a protective barrier against corrosion, significantly reducing maintenance needs in humid or outdoor environments. With a fully threaded metric coarse design and external hex drive, it ensures rapid, secure installation and easy removal, minimizing downtime in production lines. Compliant with ISO 4017, this screw offers reliable performance in applications requiring precise metric fasteners, from conveyor systems to equipment manufacturing.
Specification Summary & Compliance
This product features precise M5 x 0.8 mm coarse threads with a Class 6h thread fit for consistent engagement and alignment. It meets ISO 4017 specifications for dimensional accuracy and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial supply chains.
