# T-slot bench tops for 15-series frames: 24 × 30 to 36 × 96 in, ¾ and 1 in thick

> How do I bolt a worktop to a 1515 T-slot frame?

- Category: Hardware › Framing
- Kind: Hardware
- Basis: Xem Studio design: flat panels whose holes sit on the centre lines of a 1.5 in rail running under every edge (0.75 in in from each edge), counterbored for a 5/16-18 socket head cap screw into a slide-in T-nut
- Page: https://xemstudio.com/objects/t-slot-bench-tops/ · JSON: https://xemstudio.com/api/geometry?object=t-slot-bench-tops · Plain text: https://xemstudio.com/objects/t-slot-bench-tops/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Edges flush with the frame's outer faces when the frame's outside size equals the top. Holes no more than 12 in apart along each edge; add a cross rail for longer spans and drill its holes from the frame.

## Sizes

| size_in | thickness_in | holes |
|---|---|---|
| 24 × 30 | 0.75 | 10 |
| 24 × 30 | 1.0 | 10 |
| 24 × 48 | 0.75 | 12 |
| 24 × 48 | 1.0 | 12 |
| 30 × 48 | 0.75 | 14 |
| 30 × 48 | 1.0 | 14 |
| 30 × 60 | 0.75 | 16 |
| 30 × 60 | 1.0 | 16 |
| 30 × 72 | 0.75 | 18 |
| 30 × 72 | 1.0 | 18 |
| 36 × 72 | 0.75 | 18 |
| 36 × 72 | 1.0 | 18 |
| 36 × 96 | 0.75 | 22 |
| 36 × 96 | 1.0 | 22 |

## Where the files are

- 80/20: [15 series T-slot profiles and fasteners (1.5 in rail, 5/16-18 hardware)](https://8020.net/1515.html) — web — maker's catalogue; numbers cited

## Free STEP/STL (14 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/t-slot-bench-tops/index.json

- bench-top-24x30x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x30x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x30x0.75in.stl) — 24 × 30 × 0.75 in top: 10 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-24x30x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x30x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x30x1in.stl) — 24 × 30 × 1 in top: 10 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-24x48x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x48x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x48x0.75in.stl) — 24 × 48 × 0.75 in top: 12 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-24x48x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x48x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-24x48x1in.stl) — 24 × 48 × 1 in top: 12 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-30x48x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x48x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x48x0.75in.stl) — 30 × 48 × 0.75 in top: 14 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-30x48x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x48x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x48x1in.stl) — 30 × 48 × 1 in top: 14 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-30x60x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x60x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x60x0.75in.stl) — 30 × 60 × 0.75 in top: 16 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-30x60x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x60x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x60x1in.stl) — 30 × 60 × 1 in top: 16 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-30x72x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x72x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x72x0.75in.stl) — 30 × 72 × 0.75 in top: 18 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-30x72x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x72x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-30x72x1in.stl) — 30 × 72 × 1 in top: 18 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-36x72x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x72x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x72x0.75in.stl) — 36 × 72 × 0.75 in top: 18 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-36x72x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x72x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x72x1in.stl) — 36 × 72 × 1 in top: 18 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-36x96x0.75in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x96x0.75in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x96x0.75in.stl) — 36 × 96 × 0.75 in top: 22 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart
- bench-top-36x96x1in: [STEP](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x96x1in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-bench-tops/bench-top-36x96x1in.stl) — 36 × 96 × 1 in top: 22 Ø8.73 holes with Ø13.5 × 8.4 counterbores on the rail centre lines (0.75 in in), ≤ 12 in apart

## Questions

**Which screw?**

5/16-18 × 1¼ in (¾ in top) or 1½ in (1 in top) socket head cap screws into 15-series slide-in T-nuts.

## Fits with

- [1515 T-slot extrusion, 1.5 × 1.5 in (15-series inch)](https://xemstudio.com/objects/1515-t-slot-extrusion-inch/)
- [Slide-in T-nuts for 20, 30, 40, 45 mm and 1 in, 1.5 in T-slot extrusion](https://xemstudio.com/objects/slide-in-t-nuts/)
- [Socket head cap screws, inch: #10-24, #10-32, 5/16-18, 3/8-16, 1/2-13 (ASME B18.3)](https://xemstudio.com/objects/socket-head-cap-screws-inch/)
- [Button head socket cap screws, inch: #4-40 to 1/2-13 (ASME B18.3)](https://xemstudio.com/objects/button-head-socket-screws-inch/)
- [L corner brackets for 20, 30, 40, 45 mm and 1 in, 1.5 in T-slot extrusion](https://xemstudio.com/objects/t-slot-corner-brackets/)