S-91280A037 M20 x 120 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, extending service life in demanding industrial environments
- Exceptional mechanical strength with Class 8.8 rating and 110,000 psi tensile strength for high-stress applications
- Precision extra fine threading (M20x1.5) provides superior vibration resistance and secure fastening
- Optimized partial threading with 46mm minimum thread length ensures proper engagement while reducing weight
- Standard-compliant manufacturing to ISO 8765 DIN 960 guarantees dimensional accuracy and interchangeability
- External hex drive design enables high-torque installation with common tools for efficient assembly
- Regulatory compliance with RoHS 3 and REACH ensures environmental responsibility and workplace safety
Professional Applications & Engineering Value
This M20 hex head screw delivers critical performance advantages for industrial applications where vibration resistance and long-term reliability are paramount. The extra fine metric thread (1.5mm pitch) creates more thread contact points, significantly enhancing grip strength and preventing loosening under dynamic loads. The Class 8.8 steel construction with Rockwell C21 hardness provides optimal balance between strength and ductility, resisting shear failure in heavy machinery, structural frameworks, and automotive assemblies. The zinc plated finish offers essential corrosion protection for both indoor and outdoor applications, while the partial threading design concentrates strength where needed most, making these metric screws ideal for precision engineering applications requiring controlled clamping force and dimensional stability.
Specification Summary & Compliance
Manufactured to ISO 8765 DIN 960 standards with Class 6h thread fit tolerance ensuring precise dimensional accuracy and interchangeability. The fastener meets Class 8.8 strength grade requirements with verified 110,000 psi tensile strength and Rockwell C21 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to international substance restriction standards for industrial components.
