S-91280A274 M4 x 50 mm ISO 4014, DIN 931 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
- Class 8.8 strength rating provides reliable performance under high-stress conditions with 110,000 psi tensile strength
- Partially threaded design offers superior clamping force and vibration resistance in critical assembly applications
- External hex drive head enables quick installation and high torque application with standard tools
- Steel construction with Rockwell C21 hardness ensures exceptional durability and wear resistance
- Coarse thread with 0.7mm pitch allows for faster assembly and reduced cross-threading risks
- Black finish provides basic corrosion protection while maintaining cost-effectiveness
- Class 6g thread fit guarantees precise mating with nuts and threaded components
Professional Applications & Engineering Value
These M4 hex head screws deliver exceptional engineering value across industrial applications where high-strength fastening is critical. The Class 8.8 steel construction provides reliable performance in machinery assembly, equipment manufacturing, and structural frameworks where vibration resistance and load-bearing capacity are paramount. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening in dynamic environments. With 50mm length and 14mm minimum thread engagement, these metric screws offer versatile fastening solutions for medium to heavy-duty applications. The external hex drive ensures compatibility with standard tools, streamlining installation processes while maintaining ISO 4014/DIN 931 compliance for international project specifications.
Specification Summary & Compliance
This hex head screw features precise Class 6g thread tolerance ensuring proper fit with mating components. Manufactured to ISO 4014/DIN 931 standards with M4 x 0.7mm coarse thread configuration and right-hand threading. The fastener meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. With 50mm overall length and 14mm minimum thread length, these screws maintain dimensional accuracy for consistent performance in industrial applications.
