S-91280A559 M8 x 85 mm ISO 4014, DIN 931, SAE J1199, ISO 898 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
- Enhanced corrosion resistance with zinc plating for extended service life in harsh industrial environments
- High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration
- Class 8.8 strength grade provides superior mechanical properties for demanding applications
- Precise Class 6h thread fit guarantees secure fastening and consistent assembly quality
- External hex head design enables quick installation and removal with standard tools
- Partially threaded configuration allows for optimal clamping force distribution
- Multi-standard compliance (ISO 4014/DIN 931/SAE J1199) ensures global interoperability
Professional Applications & Engineering Value
This M8 hex head screw delivers exceptional engineering value through its Class 8.8 steel construction and zinc plated finish, specifically designed to address common industrial challenges. The coarse thread with 1.25mm pitch provides superior resistance to vibration loosening in heavy machinery, automotive assemblies, and structural frameworks. The partially threaded design concentrates clamping force precisely where needed, preventing joint failure in dynamic loading conditions. With Rockwell C21 hardness and 110,000 psi tensile strength, this metric fastener maintains integrity in high-stress applications while the external hex drive ensures efficient installation in confined spaces common in industrial equipment maintenance and manufacturing operations.
Specification Summary & Compliance
This hex head screw features M8 x 1.25mm metric coarse thread with Class 6h thread fit tolerance, 85mm length with 22mm minimum thread engagement, and complies with ISO 4014, DIN 931, and SAE J1199 manufacturing specifications. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe use across global industrial markets while maintaining consistent dimensional accuracy and mechanical performance.
