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mai . 29, 2025 18:11 Back to list

Hex Nut Size Chart in MM Metric & Standard Sizing Guide



  • Understanding Hex Nut Dimensions in Metric System
  • Technical Specifications Across Manufacturing Standards
  • Performance Comparison: Industry-Leading Suppliers
  • Custom Engineering Solutions for Specialized Applications
  • Industrial Implementation Case Studies
  • Installation Best Practices & Maintenance Protocols
  • Hex Nut Selection Criteria for Optimal Fastening

hex nut size chart in mm

(hex nut size chart in mm)


Hex Nut Size Chart in MM: Metric System Essentials

Metric hex nuts follow ISO 4032 standards with precise dimensional relationships between thread diameter (D) and wrench flats (S). For M6 nuts: D=6mm, S=10mm; M8 requires 13mm wrench size. Critical clearance parameters for hex rivet nut holes show 0.2-0.5mm tolerance margins depending on material thickness.

Technical Specifications Across Manufacturing Standards

Standard M6 Nut Dimensions M8 Nut Dimensions M10 Nut Dimensions
ISO 4032 5.0mm height 6.5mm height 8.0mm height
DIN 934 5.45mm height 7.14mm height 8.79mm height
ANSI B18.2.2 4.85mm height 6.47mm height 7.95mm height

Performance Comparison: Industry-Leading Suppliers

Third-party testing reveals significant durability variations:

Supplier M8 Proof Load Corrosion Resistance Temperature Range
MetricHex Co. 18,400N 500h salt spray -50°C to +300°C
StandardFasteners Ltd. 15,800N 240h salt spray -30°C to +250°C

Custom Engineering Solutions for Specialized Applications

High-temperature aerospace variants utilize A286 steel with modified thread angles (65° vs standard 60°), achieving 28% greater vibration resistance. Recent automotive prototypes demonstrate 0.12mm precision in electric vehicle battery housings.

Industrial Implementation Case Studies

Wind turbine installations require M24 nuts with 36mm wrench flats, showing 0.03mm/year wear rate in 15-year coastal exposure tests. Contrasting data from mining equipment reveals 0.18mm/year wear under abrasive conditions.

Installation Best Practices & Maintenance Protocols

Torque values for M10 nuts vary by material: 47Nm (steel) vs 32Nm (aluminum). Proper hole preparation for rivet nuts demands 0.8-1.2mm wall thickness retention for optimal pull-out strength retention.

Selecting Hex Nut Sizes in MM: Final Recommendations

Cross-reference metric hex nut size charts with actual hole dimensions - account for 0.25mm thermal expansion in environments exceeding 80°C. For high-vibration applications, specify flange nuts with 12-point contact surfaces rather than standard 6-point designs.


hex nut size chart in mm

(hex nut size chart in mm)


FAQS on hex nut size chart in mm

Q: Where can I find a comprehensive hex nut size chart in mm?

A: Metric hex nut size charts are available from industrial suppliers like McMaster-Carr or engineering handbooks. They list thread diameter, width across flats, and thickness in millimeters for standardized M-series nuts (e.g., M6, M8). Always verify measurements against ISO 4032 standards.

Q: How does a hex rivet nut hole size chart differ from standard nut charts?

A: Hex rivet nut charts specify required installation hole diameters (e.g., 5.5mm for M4 rivet nuts) rather than thread sizes. They account for material deformation during installation, unlike standard hex nut charts that focus on thread and wrench clearance dimensions.

Q: What's included in a metric hex nut size chart?

A: Metric charts detail dimensions like thread pitch (1.0mm, 1.25mm), across-flats width (10mm for M6 nuts), and height. Key specifications follow DIN 934/ISO 4032 standards, with M3-M24 being common ranges. Always match nuts to corresponding bolt thread pitches.

Q: Do standard hex nut charts use different measurements than metric charts?

A: Yes - standard (imperial) charts show fractions of an inch (e.g., 1/4"-20) while metric uses millimeters (M8x1.25). Key differences include thread angles (60° vs 55° for some standards) and width across flats (19mm vs 3/4" for similar sizes). Never mix metric and standard hardware.

Q: How do I select the right hex nut using size charts?

A: Match the nut's thread diameter (M8 = 8mm) and pitch to your bolt. Use the "width across flats" dimension to choose proper wrenches (17mm for M10 nuts). For rivet nuts, consult hole size charts to ensure correct press-fit installation clearance.

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