DIN7979 Extractable Dowel Pins
We offer two standards of Extractable Dowel; DIN7979D Hardened & Ground Extractable Dowels which are produced from Through Hardening Alloy 1.3505 (100Cr6) hardened to HRC58-64 with an Air Release Flat as standard and DIN7979C Metric Austenitic Stainless Steel Extractable Dowels produced from material 1.4305 (A2 Stainless Steel).
Our Metric size range is from 3mm up to 25mm diameter and are produced to an ‘m6’ interference fit tolerance band which is explained more clearly in the chart below.
| Diameter Range | Tolerance Band (m6) |
| From 3 to 6mm | +0.004 / +0.012mm |
| From 6 to 10mm | +0.006 / +0.015mm |
| From 10 to 18mm | +0.007 / +0.018mm |
| From 18 to 30mm | +0.008 / +0.021mm |
The standard tapping specifications for Extractable Dowels to DIN7979D/C are as below.
| Diameter | Internal Thread |
| 3mm | M2 x 3.5 deep |
| 4mm | M2.5 x 4 deep |
| 5mm | M3 x 5 deep |
| 6mm | M4 x 6 deep |
| 8mm | M5 x 8 deep |
| 10mm | M6 x 10 deep |
| 12mm | M6 x 10 deep |
| 16mm | M8 x 12 deep |
| 20mm | M10 x 16 deep |
| 25mm | M16 x 24 deep |
If you require alternative tapping sizes please refer to our specification A05 or D05.
Sizes outside of this range including h6 diameter can be produced to order, please enquire.
