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Kapwinnnng
(@kapwinnnng)
Active Member
Nozzle Identification

So, I've mixed up some nozzles and I need some help identifying them.  

How do I tell a regular brass .4mm nozzle from a CHT nozzle from a high flow nozzle? I'm missing some of the nozzle holders that they came in and these are just loose.  

I tried to look the numbers up on the store, but I haven't been able to find the actual numbers that match what is marked on the actual nozzle. 

 

Thanks for the help!

Publié : 28/05/2026 9:49 pm
k1mu
 k1mu
(@k1mu)
Estimable Member
RE: Nozzle Identification

First, read the nozzle. For my Prusa 0.4 High-flow, the lettering on the silver tube/cylinder says "CHT 0.4" .
Obxidian 0.4 says "PR Obx 0.4". 
I'd say that most if not all of the native Nextruder nozzles are labeled on that tube.
Then, you can tell from the pips on the extruder. See https://help.prusa3d.com/article/e3d-v6-nozzles_920168

Publié : 28/05/2026 11:30 pm
Kapwinnnng
(@kapwinnnng)
Active Member
Topic starter answered:
RE: Nozzle Identification

Yes, they all say PR and the size... mine don't actually say what they are though. One of them has dimples on all of the flats on the hex part, the other has some sort of engraving that's too small to see. I was expecting to see an HF for the high flow or CHT... These are all genuine Prusa nozzles. One came with my MK4. I think the HF came with the MK4S upgrade. One came with the Core One, and I got a different one with the MMU. I bought an Obxidian, which it's obvious by just looking at it which one that is, as is the 2.5mm.

The images of the different nozzles in the store show dimples on one, and something else on the other. I just wanted to get these sorted back out and in the right storage box...

Publié : 29/05/2026 12:23 am
JustMe3D
(@justme3d)
Honorable Member
RE: Nozzle Identification

The dimples (total number of dimples on the nozzle and location of the dimples, up to two dimples on one flange) are a standard E3D code for the diameter. Easy to find on the web

I try to give answers to the best of my ability, but I am not a 3D printing pro by any means, and anything you do you do at your own risk. BTW: I have no food for…

Publié : 29/05/2026 10:00 am
Kapwinnnng
(@kapwinnnng)
Active Member
Topic starter answered:
RE: Nozzle Identification

So, Prusa uses that code on their Nextruder nozzles too?

Publié : 29/05/2026 11:48 am
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