DIN 7979D Dimensional Specifications Table
DIN 7979D specifies metric, hardened and ground parallel dowel pins featuring an internal thread for easy extraction. These precision-engineered fasteners are typically ground to an m6 interference fit tolerance to provide accurate positioning and repeatable assembly alignment within reamed holes, commonly used in jigs, fixtures, and machinery.
| Nominal Diameter (d) | m6 Tolerance Range (mm) | Internal Thread (d₂) | Clearance Dia. (d₃) | Thread Depth (t₁ min) | Total Internal Depth (t₂ min) |
|---|---|---|---|---|---|
| 4 mm * | +0.012 to +0.004 | M2 | — | 4 mm | — |
| 5 mm * | +0.012 to +0.004 | M3 | — | 5 mm | — |
| 6 mm | +0.012 to +0.004 | M4 | 4.3 mm | 6 mm | 10 mm |
| 8 mm | +0.015 to +0.006 | M5 | 5.3 mm | 8 mm | 12 mm |
| 10 mm | +0.015 to +0.006 | M6 | 6.4 mm | 10 mm | 16 mm |
| 12 mm | +0.018 to +0.007 | M6 | 6.4 mm | 10 mm | 16 mm |
| 14 mm | +0.018 to +0.007 | M8 | 8.4 mm | 12 mm | 20 mm |
| 16 mm | +0.018 to +0.007 | M8 | 8.4 mm | 12 mm | 20 mm |
| 20 mm | +0.021 to +0.008 | M10 | 10.5 mm | 16 mm | 25 mm |
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