Slide-in T-nuts for 20, 30, 40 and 10-series (1 in) extrusion — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/slide-in-t-nuts/  (CC BY 4.0)
Basis: Drawn exact to the slot: body = cavity width × depth under the lips, tongue = slot opening × lip; threads as standard tap-drill holes
Catalog version: 2026-10-20

Sizes: see table below
- 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.

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

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: T-slot nut — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/T-slot_nut
- OpenBuilds: Tee nuts and brackets for V-slot — web, STEP — OpenBuilds site [verify license at link] — https://openbuildspartstore.com/
- Long Earth Society: Engine and rig builds on extrusion frames — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/slide-in-t-nuts/index.json
API: https://xemstudio.com/api/geometry?object=slide-in-t-nuts