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Slide-in T-nuts for 20, 30, 40 and 10-series (1 in) extrusion
What are 2020 T-nut dimensions? · Hardware · basis: Drawn exact to the slot: body = cavity width × depth under the lips, tongue = slot opening × lip; threads as standard tap-drill holes
Long Earth Society build part. Brackets and feet on the LES 2020 test stands; motor and bearing mounts hang off these. The engines
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 4 in table
Notes
- The body is the slot cavity's width by the depth under the lips, and the tongue on top is the slot opening by the lip thickness, running the nut's full length; none has clearance drawn in.
- 20-series: 11 × 11 × 4.2 body, 6 × 1.8 tongue, 6 mm overall, M3 / M4 / M5. 30-series: 16.5 × 16.5 × 6, tongue 8 × 2.5, M5 / M6 / M8. 40-series: 20 × 20 × 6.5, tongue 8 × 3, M6 / M8. 10-series: 14.4 × 14.4 × 4.8, tongue 6.5 × 2.3, 1/4-20 / 10-32.
- The thread hole is the standard tap drill: M3 2.5, M4 3.3, M5 4.2, M6 5.0, M8 6.8, 1/4-20 5.1, 10-32 4.0.
- A slide-in nut enters from the end of the profile; the body edges carry a 0.8 mm chamfer.
Sizes
| series | body_mm | tongue_mm | overall_h_mm | threads |
|---|---|---|---|---|
| 20 | 11 × 11 × 4.2 | 6 × 1.8 | 6.0 | M3, M4, M5 |
| 30 | 16.5 × 16.5 × 6 | 8 × 2.5 | 8.5 | M5, M6, M8 |
| 40 | 20 × 20 × 6.5 | 8 × 3 | 9.5 | M6, M8 |
| 10 (1 in) | 14.4 × 14.4 × 4.8 | 6.5 × 2.3 | 7.1 | 1/4-20, 10-32 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| slide-in T-nut body | cavity width × (depth − lip), e.g. 11 × 4.2 on 20-series | slot cavity | slide | tnut-slide-* |
| T-nut tongue | slot opening × lip (6.0 × 1.8 on 20-series; 8.0 on 30/40; 6.5 on 10-series) | slot opening | slide | tnut-* |
| T-nut thread hole | tap drill (M3 2.5 … M8 6.8, 1/4-20 5.1, 10-32 4.0) | screw thread | designed | tnut-* |
| bracket / gusset / plate screw holes | Ø5.5 / 6.6 / 9.0 / 7.14 | M5 / M6 / M8 / 1/4-20 clearance | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | T-slot nut | web | CC BY-SA 4.0 (text) |
| OpenBuilds | Tee nuts and brackets for V-slot | web, STEP | OpenBuilds site verify |
| Long Earth Society | Engine and rig builds on extrusion frames | web, video | LES site |
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
| tnut-slide-20-m3 | slide-in T-nut, 20-series slot: body 11 × 11 × 4.2, tongue 6 × 1.8 (exact to the slot), M3 tap-drill hole Ø2.5 | STEP · STL |
| tnut-slide-20-m4 | slide-in T-nut, 20-series slot: body 11 × 11 × 4.2, tongue 6 × 1.8 (exact to the slot), M4 tap-drill hole Ø3.3 | STEP · STL |
| tnut-slide-20-m5 | slide-in T-nut, 20-series slot: body 11 × 11 × 4.2, tongue 6 × 1.8 (exact to the slot), M5 tap-drill hole Ø4.2 | STEP · STL |
| tnut-slide-30-m5 | slide-in T-nut, 30-series slot: body 16.5 × 16.5 × 6, tongue 8 × 2.5 (exact to the slot), M5 tap-drill hole Ø4.2 | STEP · STL |
| tnut-slide-30-m6 | slide-in T-nut, 30-series slot: body 16.5 × 16.5 × 6, tongue 8 × 2.5 (exact to the slot), M6 tap-drill hole Ø5 | STEP · STL |
| tnut-slide-30-m8 | slide-in T-nut, 30-series slot: body 16.5 × 16.5 × 6, tongue 8 × 2.5 (exact to the slot), M8 tap-drill hole Ø6.8 | STEP · STL |
| tnut-slide-40-m6 | slide-in T-nut, 40-series slot: body 20 × 20 × 6.5, tongue 8 × 3 (exact to the slot), M6 tap-drill hole Ø5 | STEP · STL |
| tnut-slide-40-m8 | slide-in T-nut, 40-series slot: body 20 × 20 × 6.5, tongue 8 × 3 (exact to the slot), M8 tap-drill hole Ø6.8 | STEP · STL |
| tnut-slide-10in-1-4-20 | slide-in T-nut, 10in-series slot: body 14.4 × 14.4 × 4.8, tongue 6.5 × 2.3 (exact to the slot), 1/4-20 tap-drill hole Ø5.1 | STEP · STL |
| tnut-slide-10in-10-32 | slide-in T-nut, 10in-series slot: body 14.4 × 14.4 × 4.8, tongue 6.5 × 2.3 (exact to the slot), 10-32 tap-drill hole Ø4 | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=slide-in-t-nuts
How it fits
Goes in or on
Aluminium T-slot extrusionbody in the slot cavity, tongue in the opening (slide)Connects to
Button head socket screws, M2–M8screw into the tap-drill holeAlternatives
Drop-in T-nuts for 20, 30, 40 and 10-series…drop in from the face instead of the endYou might also need
Questions
What are 2020 T-nut dimensions?
Slide-in: 11 × 11 × 4.2 mm body with a 6.0 × 1.8 tongue, 6 mm tall overall, threaded M3, M4 or M5 as tap-drill holes.
Are the printable T-nuts drawn with clearance?
No; body and tongue equal the slot's sizes, and the Mating features list the faces that meet the slot and their fit.
What thread for an 8020 10-series T-nut?
1/4-20 (5.1 mm tap drill) or 10-32 (4.0 mm).