Self-lubricating 3D printable materials for space Materials used in space need to not outgas significantly  

An answer to this question: Would 3d-printed objects outgas in vacuum?

referred to the NASA outgassing database which showed that ABS, PET, and PLA filaments are all fairly low outgassing and suitable for space application.

What I'm wondering is whether there are any 3D-printable plastics that are both suitable for space and also self-lubricating.   Nylon is the obvious printable self-lubricating material, but I believe that it outgasses too much (I don't think NASA has tested nylon filament, at least I can't find it in the database). 

My primary interest is in hobbyist-grade, FDM printers but if there are materials that can be commercially 3D printed, that is also of interest.

Any ideas?
Well, I think this depends on your machine.  If you can support extrusion temps north of 350C and bed temps ~150C, you could try PEI:

https://www.3dxtech.com/ultem-9085-3d-printing-filament/

I believe PEI has self-lubricating properties, and has outgassing of ~0.40% TML (PET is ~0.43%).  Of course, most off-the-shelf printers don't handle that sort of temp range.  But then, industrial grade materials are likely to require industrial grade machines.  :)

You could compare other DBs to NASA's as well.

Outgassing DB:  http://esmat.esa.int/materialframe.html

By the way, Nylon has an outgassing aspect >2.0% TML, which is definitely on the high side for vacuum applications.