S-91180A548 M8 x 55 mm ISO 8765, DIN 960 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 that protects against harsh industrial environments and extends service life
- High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration, reducing failure risks
- Class 8.8 strength grade provides excellent durability and load-bearing capacity for demanding mechanical applications
- Fine pitch M8x1 mm threading offers superior vibration resistance and precise clamping force control in assembled components
- Partially threaded design with 22mm minimum thread length allows optimal grip range while maintaining unthreaded shank strength
- External hex drive with 13mm head width enables high-torque installation using standard tools for efficient assembly
- Full compliance with ISO 8765 and DIN 960 standards guarantees dimensional accuracy and interchangeability in global supply chains
Professional Applications & Engineering Value
These M8 hex head screws deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The Class 8.8 steel construction with Rockwell C21 hardness withstands dynamic loads in machinery, automotive assemblies, and industrial equipment. The fine pitch metric threading (M8x1 mm) maintains clamp force under cyclic stress, while the zinc plated finish provides essential corrosion protection in manufacturing environments. The partially threaded configuration concentrates strength where needed most, making these industrial fasteners ideal for precision applications requiring reliable, long-term performance without frequent maintenance.
Specification Summary & Compliance
Manufactured to ISO 8765 and DIN 960 specifications with Class 6h thread fit tolerance ensuring precise engagement. The 55mm length with 22mm minimum thread length provides consistent performance across applications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international standards for industrial use.
