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Dowel pins with internal thread, ISO 8733: Ø6–Ø50 extraction thread, thread depth, counterbore
What extraction thread, thread depth and counterbore does an ISO 8733 dowel pin with internal thread have for Ø6 to Ø50? · Standard part · basis: Westfield Fasteners' ISO 8733 table (d1, c1, c2, d2, P, d3, t1, t2, t3), cross-checked against OPAC's ISO 8733 table
Also called: iso 8733 dimensions, extractable dowel pin 10 mm thread, pull dowel m6 thread depth, dowel pin with tapped hole, iso 8735 dowel
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- sizes
- 10 in table
Notes
- Columns: pin diameter d1, thread d2, counterbore d3, thread depth t1, counterbore depth t3, drawn length l. Hardened pins to ISO 8735 use the same d2 per diameter.
- One representative length per diameter is drawn; other lengths change l only. End chamfers c1/c2 (≈ values) are not drawn.
Dowel pins with internal thread, ISO 8733: Ø6–Ø50 extraction thread… size chart
| d1 | thread | d3 | t1 | t3 | l drawn |
|---|---|---|---|---|---|
| 6 | M4 | 4.3 | 6 | 1 | 20 |
| 8 | M5 | 5.3 | 8 | 1.2 | 25 |
| 10 | M6 | 6.4 | 10 | 1.2 | 30 |
| 12 | M6 | 6.4 | 12 | 1.2 | 30 |
| 16 | M8 | 8.4 | 16 | 1.5 | 40 |
| 20 | M10 | 10.5 | 18 | 1.5 | 50 |
| 25 | M16 | 17 | 24 | 2 | 60 |
| 30 | M20 | 21 | 30 | 2 | 80 |
| 40 | M20 | 21 | 30 | 2.5 | 100 |
| 50 | M24 | 25 | 36 | 2.5 | 120 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| pin | d1 (m6): Ø6 to Ø50 | reamed hole H7 of the same Ø | press | all |
| extraction thread | d2 × t1: M4 × 6 (Ø6) to M24 × 36 (Ø50); Ø10 M6 × 10 | extraction screw or slide hammer | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Westfield Fasteners | ISO 8733 extractable dowel pin: d1, c1, c2, d2, P, d3, t1, t2, t3 | web | Publisher's page; dimensions are facts |
| OPAC | ISO 8733 table | web | Publisher's page; dimensions are facts |
| ISO (iTeh preview) | ISO 8735:1997 Table 1, hardened pins with internal thread | web | Publisher's page; dimensions are facts |
Free files
★ Free files 10 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| iso8733-6x20 | ISO 8733 6×20: M4 to depth 6, counterbore Ø4.3×1 | STEP · STL |
| iso8733-8x25 | ISO 8733 8×25: M5 to depth 8, counterbore Ø5.3×1.2 | STEP · STL |
| iso8733-10x30 | ISO 8733 10×30: M6 to depth 10, counterbore Ø6.4×1.2 | STEP · STL |
| iso8733-12x30 | ISO 8733 12×30: M6 to depth 12, counterbore Ø6.4×1.2 | STEP · STL |
| iso8733-16x40 | ISO 8733 16×40: M8 to depth 16, counterbore Ø8.4×1.5 | STEP · STL |
| iso8733-20x50 | ISO 8733 20×50: M10 to depth 18, counterbore Ø10.5×1.5 | STEP · STL |
| iso8733-25x60 | ISO 8733 25×60: M16 to depth 24, counterbore Ø17×2 | STEP · STL |
| iso8733-30x80 | ISO 8733 30×80: M20 to depth 30, counterbore Ø21×2 | STEP · STL |
| iso8733-40x100 | ISO 8733 40×100: M20 to depth 30, counterbore Ø21×2.5 | STEP · STL |
| iso8733-50x120 | ISO 8733 50×120: M24 to depth 36, counterbore Ø25×2.5 | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=dowel-pins-internal-thread-iso-8733

Fits with


Questions
What thread is in a 10 mm pull dowel?
ISO 8733 Ø10: M6, 10 mm deep, with a Ø6.4 × 1.2 mm counterbore.
Which pins have the same extraction thread?
Hardened ISO 8735 pins use the same thread per diameter (M4 for Ø6 up to M24 for Ø50).