Twist Locking Nut for Aluminum Extrusion (30x30mm)

This is a twist-lock nut for 30×30 mm aluminum extrusion , inspired by the twist lock included with the Prusa XL .

It’s designed to slide into the extrusion slot and lock in place with a simple twist, providing a clean and secure mounting point.

What It’s For

These twist locks are useful anytime you need to attach parts to 30 mm aluminum extrusion , including:

Building or modifying Prusa XL enclosures

Mounting panels, brackets, or accessories

Custom extrusion-based frames or projects

Multiple variants are included so you can choose the right fastener size for your setup.

Included Files

Twist Lock – No Nut

Basic twist-lock component only

Ideal for integrating your custom designs

Twist Lock – M3 Bolt

Rear hole sized for a standard M3 bolt

Twist Lock – M4 Bolt

Rear hole sized for a standard M4 bolt

Twist Lock – M5 Bolt

Rear hole sized for a standard M5 bolt

STEP Files

Provided for all variants for easy modification

Onshape Public Document Here

So you can fork and edit the design to your exact needs

Print Instructions

Layer Height:

0.2 mm recommended

Infill:

20–30% (gyroid or cubic works well)

Supports:

Not required

Filament:

PLA works for light-duty use

PETG recommended for enclosures or higher temperatures

Assembly & Usage

Insert the twist lock into the 30×30 extrusion slot

Rotate until it locks into place

Install the bolt (if applicable)

Thread in your bolt to secure the attached part

No post-processing should be required.

Design Notes & Variants

Modeled specifically for 30×30 mm aluminum extrusion