This is a rack designed specifically for Small Bead Organizer.
This small box is easily purchased on Amazon and is suitable for 43x43x20mm (1.7 x 1.7 x 0.79 Inch)

Searching Amazon for "small bead organizer" yields many results.
I have included a few links for reference. Please note that this does not mean that I have purchased the products on this page. Please be careful before purchasing.

JP Amazon

Amazon.co.jp: 小物収納ケース 40個セット 透明仕様 小物収納 パーツ 小物 小分け 40個セット(4.2cm×4.2cm×2cm) : ホビー

US Amazon

Amazon.com: SATINIOR 24 Packs Small Clear Plastic Beads Storage Containers Box with Hinged Lid for Storage of Small Items, Crafts, Jewelry, Hardware (1.7 x 1.7 x 0.8 Inches) : Arts, Crafts & Sewing

Due to the irregularities on the sides of the box, there are some errors in the width data of each vendor. You can use the height of 2cm as a basis for judgment.

If you want to make the same 20 combinations as me, please print two words each for 01 and 02.

The tolerance is designed to be relatively strict, 0.2. It is recommended to confirm whether your 3D printer allows a tolerance of 0.2 to avoid failure to assemble.

Regarding labels, I have made all the commonly used ones, you just need to choose what you need according to your needs.

From left to right they are insert, nut, and bolt.

Printing does not require any support.

Happy printing!