Counterbore Hole Size Chart for Cheese Head Fasteners (DIN)
DIN counterbore hole size chart for cheese head fasteners, including pilot hole diameters (H12, H13, H14), counterbore diameters, and depths in millimetres
Cheese Head Fastener Chart (DIN)
| Fastener Size | Pilot Hole Diameter (mm) | Counterbore Diameter (mm) | Counterbore Depth (mm) | ||
|---|---|---|---|---|---|
| Close Fit H12 | Normal Fit H13 | Loose Fit H14 | |||
| M1.6 | 1.7 | 1.8 | 2 | 3.5 | 1.7 |
| M2 | 2.2 | 2.4 | 2.6 | 4.4 | 2.2 |
| M2.5 | 2.7 | 2.9 | 3.1 | 5.5 | 2.6 |
| M3 | 3.2 | 3.4 | 3.6 | 6.5 | 2.8 |
| M4 | 4.3 | 4.5 | 4.8 | 8 | 3.1 |
| M5 | 5.3 | 5.5 | 5.8 | 10 | 4.1 |
| M6 | 6.4 | 6.6 | 7 | 11 | 4.7 |
| M8 | 8.4 | 9 | 10 | 15 | 5.8 |
| M10 | 10.5 | 11 | 12 | 18 | 6.8 |
About DIN Counterbore Hole Sizes for Cheese Head Fasteners
This DIN counterbore hole size chart provides standardized dimensions for cheese head fasteners according to DIN standards. It includes recommended pilot hole diameters (H12, H13, H14), counterbore diameters, and counterbore depths in millimeters, ensuring precise fit and proper seating of screws in mechanical assemblies.
Using accurate DIN counterbore hole dimensions helps achieve proper screw alignment, consistent assembly quality, and compliance with international standards. This reference is useful for engineers, machinists, and designers working with DIN fasteners, including:
- Mechanical engineers and product designers creating assemblies with DIN-standard cheese head fasteners.
- Machinists and technicians drilling pilot holes and counterbores with precise tolerances.
- Fabricators ensuring correct fit, alignment, and dimensional accuracy in components and machinery.
- Assembly and maintenance professionals referencing standardized DIN counterbore dimensions for reliable fastening.
Key Terms in the DIN Counterbore Chart
- Pilot Hole Diameter (H12, H13, H14): Initial drilled hole guiding the screw, with different tolerance grades for fit precision.
- Counterbore Diameter: Enlarged cylindrical recess allowing the cheese head screw to sit flush or below the surface.
- Counterbore Depth: Depth of the recess matching the screw head height for proper seating.
- DIN Standard: The German Industrial Standard (Deutsches Institut für Normung) defining dimensions and tolerances for mechanical components.
Referencing this DIN counterbore hole size chart for cheese head fasteners ensures consistent part design, accurate drilling, and proper assembly. Using these dimensions improves manufacturing quality, reduces errors, and guarantees correct fit and alignment across DIN-standard mechanical systems.