This is a universal 3-slot end cap for 4080 T-slot aluminum extrusion profiles, designed to securely cover the profile while keeping one rail open for functional access — perfect for cable routing or mounting accessories.

The part engages three slots and the central hole using a tight friction-fit, staying in place without screws or adhesives.
Its rounded corners follow the contour of the extrusion, providing a neat, finished look while maintaining functionality.

Compatible with most T-slot 4080 systems (Bosch, Item, Motedis, OpenBuilds, etc.), but since internal tolerances vary slightly, you may need to tweak the fit by ±0.1–0.2 mm in your slicer.

✅ Features

Fits T-slot 4080 profiles (80×40 mm)

Covers 3 slots and center hole — 1 open for access

Rounded corners for a clean OEM-like finish

Friction-fit design, no screws needed

Compatible with multiple 4080 brands

Ideal for end caps or modular connections

Printable flat — no supports required

🧰 Applications

Protecting 4080 profile ends

Maintaining one open slot for attachments

Clean enclosure corners and rail endings

Dual-use as a connector between 4040 profiles

🛠 Recommended Print Settings

Material: PETG or ABS (strength), PLA (decorative)

Layer Height: 0.2 mm

Infill: 50–100 %

Supports: None

Orientation: Flat on bed

📏 Compatibility

Works with most T-slot 4080 extrusions (Bosch, Item, OpenBuilds, etc.)

Tolerance may need ±0.1–0.2 mm adjustment

Not fully compatible with Misumi profiles