Internally Tapped Extraction Dowel
Parallel dowel pin with an internal thread at one end for removal via an extraction bolt.
This is a dimension schematic, not a manufacturing drawing. Dimensions match the catalog data; request a quote with the part code to confirm before production.
Code & Size Table
Code, dimensions and tolerance for all 10 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| TESA-DPT-04 | 4 | 20 | ⌀2.1 | m6 · ⌀4: +0.012/+0.004 | internal thread M2.5 – ISO 8733 |
| TESA-DPT-05 | 5 | 24 | ⌀2.5 | m6 · ⌀5: +0.012/+0.004 | internal thread M3 – ISO 8733 |
| TESA-DPT-06 | 6 | 30 | ⌀3.3 | m6 · ⌀6: +0.012/+0.004 | internal thread M4 – ISO 8733 |
| TESA-DPT-08 | 8 | 36 | ⌀4.2 | m6 · ⌀8: +0.015/+0.006 | internal thread M5 – ISO 8733 |
| TESA-DPT-10 | 10 | 45 | ⌀5 | m6 · ⌀10: +0.015/+0.006 | internal thread M6 – ISO 8733 |
| TESA-DPT-12 | 12 | 50 | ⌀5 | m6 · ⌀12: +0.018/+0.007 | internal thread M6 – ISO 8733 |
| TESA-DPT-14 | 14 | 55 | ⌀6.8 | m6 · ⌀14: +0.018/+0.007 | internal thread M8 – ISO 8733 |
| TESA-DPT-16 | 16 | 60 | ⌀6.8 | m6 · ⌀16: +0.018/+0.007 | internal thread M8 – ISO 8733 |
| TESA-DPT-18 | 18 | 70 | ⌀8.5 | m6 · ⌀18: +0.018/+0.007 | internal thread M10 – ISO 8733 |
| TESA-DPT-20 | 20 | 80 | ⌀8.5 | m6 · ⌀20: +0.021/+0.008 | internal thread M10 – ISO 8733 |
Prices are for approved members.
Material & Tolerance
The standard material is listed below; also available in steel, stainless, brass and aluminium. Dimensions in mm; tolerances machined to ISO. Deviations (mm) are given for the nominal diameter according to the ISO 286-2 tables; thread tolerances (6g/6H) are to ISO 965. For custom sizes/tolerances, contact us with the part code.
Manufacturing Scope
Internally Tapped Extraction Dowel is a Fixing & Locating family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀4–20 mm, lengths 20–80 mm, standard material Steel (also stainless steel, brass or aluminium). Every variant's part code, dimension and tolerance is listed below; request a quote with the code you need.
The family is machined from ⌀20 mm bar stock; its longest variant is TESA-DPT-20 at 80 mm. Besides turning, the family requires axial drilling (⌀2.1–8.5 mm). All of it is completed in a single setup, without the part leaving the machine.
The variant with the highest length-to-diameter ratio is TESA-DPT-04: 20 mm long at ⌀4 mm, L/D 5.0. This ratio is achievable on a conventional lathe as well; the sliding-head advantage in series work is that the part never leaves the machine, so the size does not drift from variant to variant.
Variants are machined to m6 tolerance; the smallest is TESA-DPT-04 (⌀4 mm) and the largest TESA-DPT-20 (⌀20 mm). The family includes bored variants. Custom sizes, tolerances or materials are produced to the part code on request.
Need a size that isn't listed? We machine to your drawing — CNC contract machining. How these parts are made: What is a Swiss-type lathe?
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