Is this 3D model free to download?

Yes, Thread test rings free - check the fit before printing a screw-on funnel is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Cults3D. Use the "Download from Cults3D" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by AMPERELAB3D, published on Cults3D. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Thread test rings free - check the fit before printing a screw-on funnel 3D printable model by AMPERELAB3D

Thread test rings free - check the fit before printing a screw-on funnel photo 1

Thread test rings free - check the fit before printing a screw-on funnel photo 2

Thread test rings free - check the fit before printing a screw-on funnel

Source: Cults3D by AMPERELAB3D

The Thread test rings free - check the fit before printing a screw-on funnel is a free printable 3D model from Cults3D by AMPERELAB3D. What it is Short nut rings for all 20 bottle threads of the screw-on funnels (PCO 1881/1810, 38 mm two-start, GL, GPI), three clearance steps on one bar. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Cults3D

30 saves Source: Cults3D Updated 2026-09-27 Filament: 42 g License: PRIVATE-USE · non-commercial Category: Tools & Workshop

Tags: thread test, gewindetest, test ring, probierring, bottle thread, flaschengewinde, pco 1881, gpi 400, fit test, free, kostenlos, screw on bottle funnel, schraubtrichter, thread gauge, gewindelehre

About this model

What it is Short nut rings for all 20 bottle threads of the screw-on funnels (PCO 1881/1810, 38 mm two-start, GL, GPI), three clearance steps on one bar. The bottle neck passes through the bar. Print, screw onto your bottle, note the step that fits. Test plugs for the screw-in funnels M12 to M42 are a separate free listing. Dimensions (measured on the CAD solid) 20 models. Height 7.6-11.6 mm, largest width 83.9-321.6 mm, weight 6.3-42.1 g of PETG if printed solid (an upper bound; with 3 perimeters the slicer prints the thin walls solid anyway). Space needed on the bed (as printed): up to 305.9 x 106 x 11.6 mm. One model exceeds 256 x 256 x 250 mm - check your printer's build volume first. The dimension sheet in the download and in the second image lists every size. Why this one Notches mar…

Frequently asked questions

Is this 3D model free to download?: Yes. Thread test rings free - check the fit before printing a screw-on funnel is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Cults3D, not by Thinger. We link you directly to the original listing by AMPERELAB3D.
Who made this model?: Designed by AMPERELAB3D, published on Cults3D. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.