I am not an attorney, so this isn't legal advice. Like any legal question, you should consult with an actual attorney, who can consider all the gory details.

That said, it seems like you've got the BY and SA parts covered. "Non-commercial" is more difficult: does a sale that's not for profit count as "commercial"?

The Creative Commons site (https://creativecommons.org/faq/#does-my-use-violate-the-noncommercial-clause-of-the-licenses) explains it a bit more, as pasted below. But perhaps the best thing is to just drop an email to the originator and ask. Probably you'll get an email back saying it's fine; and who knows, maybe you'll make a new friend, too. I've been on both ends of exchanges like that, and it's generally worked just fine.

Does my use violate the NonCommercial clause of the licenses?

CC's NonCommercial (NC) licenses prohibit uses that are "primarily
intended for or directed toward commercial advantage or monetary
compensation." This is intended to capture the intention of the
NC-using community without placing detailed restrictions that are
either too broad or too narrow. Please note that CC's definition does
not turn on the type of user: if you are a nonprofit or charitable
organization, your use of an NC-licensed work could still run afoul of
the NC restriction, and if you are a for-profit entity, your use of an
NC-licensed work does not necessarily mean you have violated the term.
Whether a use is commercial will depend on the specifics of the
situation and the intentions of the user.

In CC's experience, it is usually relatively easy to determine whether
a use is permitted, and known conflicts are relatively few considering
the popularity of the NC licenses. However, there will always be uses
that are challenging to categorize as commercial or noncommercial. CC
cannot advise you on what is and is not commercial use. If you are
unsure, you should either contact the rights holder for clarification,
or search for works that permit commercial uses.

CC has a brief guide to interpretation of the NC license that goes
into more detail about the meaning of the NC license and some key
points to pay attention to. Additionally, in 2008, Creative Commons
published results from a survey on meanings of commercial and
noncommercial use generally. Note that the results of the study are
not intended to serve as CC's official interpretation of what is and
is not commercial use under our licenses, and the results should not
be relied upon as such.

I've informed myself a bit about this and found out the following:

It is good that you state the Name/Website or any Reference about original creator
Creative Commons absolutely requires this, even if you don't charge anything for your prints.
So, whether you are trying selling your print or not, you should still always do this.

You are not allowed to sell your prints
Creative Commons License dictates that you are not allowed to commercialize products that are based on any of their sources. This means, even if you are only charging the printing costs, you are not allowed to sell them, as you are profiting of their sources because you did not design the prints yourself.

For further information on this, you should probably check out the official page for this, https://creativecommons.org/licenses/by-nc-sa/3.0/

I hope this helps, Max

Preface

I am Not a Lawyer, the stack does not give legal advice, consult a licensing lawyer and the maker to check your use is within the licensing agreeming or make a seperate one

Read your license

The license CreativeCommons specifies BY-NC-SA as:

• BY = Attribute. You may share and modifiy it, as long as you tell who made it.


• NC = Non Commercial


• SA = Share Alike. You may not change the license

Non Commercial

The Non Commercial clause explained in the FAQ says:

CC's NonCommercial (NC) licenses prohibit uses that are "primarily intended for or directed toward commercial advantage or monetary compensation." [...] Whether a use is commercial will depend on the specifics of the situation and the intentions of the user.

[...] If you are unsure, you should either contact the rights holder for clarification, or search for works that permit commercial uses.

It also provides a CC-Wiki entry what NC is meant to be (pretty much the same as the FAQ), and a survey on it.

What is NC?

Ok, let's look at the NC part of the CC... When is something breaking the NC license? As soon as it is "primarily intended toward monetary gain" it is commercial (short version), and any commercial use is prhibited. What is this? well, let's read the report...

Specifically excluded from the prohibition against
noncommercial use in the NC licenses is the exchange of a CC-licensed work for
any other copyrighted work, whether by means of peer-to-peer digital file-sharing
or otherwise, provided no monetary compensation is involved.^p.17

Most^{[significantly>50%]} participants thought that “noncommercial use” had no
legal definition, or were not sure. Some^[<50%] participants believed noncommercial use to be
more likely a fair use than not, and some conflated noncommercial use and fair
use. Some participants also mentioned personal or private use as being both
legally and pragmatically a noncommercial use, though they were not certain of
any law defining “personal use.”^p.30

When asked to share their understandings of noncommercial use, no participant
could provide a definition of noncommercial use that worked for everyone in their
particular group, although there was much agreement on elements of many of
the definitions. Through discussion, it emerged that creators take a variety of
factors into account when determining what constitutes noncommercial use.
These factors are often considered on a case-by-case basis[...]^p.30

However, participants across communities were able to articulate a list of factors
they generally agreed as a group were relevant to creators’ understanding of
whether a use of a work is commercial or noncommercial.^p.31

Qualitative Research Consideration Factors^p.31

• Perceived economic value of the content


• The status of the user as an individual, an amateur or professional, a for-profit or
  not-for-profit organization, etc.


• Whether the use makes money (and if
  so, whether revenues are profit or recovery of costs associated with
  use)


• Whether the use generates promotional value for the creator or
  the user


• Whether the use is personal or private


• Whether the use is
  for a charitable purpose or other social or public good


• Whether the
  use is supported by advertising or not


• Whether the content is used in
  part or in whole


• Whether the use has an impact on the market or is by
  a competitor

Of particular interest are these paragraphs:

Creators in the groups recognized that they consider some factors more
important than others, and they also weigh the factors differently. Some consider
certain factors to be “gatekeeping” questions, the answer to which settles the
matter. Some creators consider a use commercial if there is any advertising in
connection with it, for example. Others consider certain factors to be questions of
degree. For example, some creators consider recovery of costs to distribute a
work a noncommercial use, but not if salaries or other overhead are calculated
as part of cost recovery. Rather than constituting a simple checklist, for many
creators the factors exist within a matrix in which the type of use (for example,
promotional or advertising use) and the context or community-based nature of
the use (for example, charitable use, or use in a public school) are important
vectors. In sum, the decision-making process is not clear-cut.^p.32

In the quantitative surveys for both Phase 2 (creators) and Phase 3 (users), the
first mention of “noncommercial use” appears in an open-ended question asking
respondents how they would define the difference between a commercial use
and a noncommercial use of a work, in their own words and without consulting
other sources. Creators and users provided an answer in the same ratio –
approximately 7 in 10 from each group.^p.49

A
large majority of both creators and users define a commercial use as one in
which money is made (73% of creators, 76% of users). [...] Neither group expresses a majority consensus on an
understanding of noncommercial use. [...] the most common mention of a
noncommercial use by both creators and users is some use by an individual
(19% of creators, 33% of users), including personal and private uses.^p.50

Gatekeeping Factors^p.54

Making Money

The figure below provides a visual summary of the anchor point exercise
measuring responses to uses that make money.

On the question of making money for cost recovery, creators think covering
distribution costs only is slightly more commercial than covering operating costs,
or raising money for an endowment fund. Users tend to agree, but overall see
these uses as rather more commercial than creators.^p.60

Conclusion

Contakt the maker that designed the part what is OK with them. But be warned: The broad idea the report gives is that around 3 of 4 of the makers and 4 of 5 users deem a "For Profit-Company selling [a thing] to cover distribution costs" as breaking the NC clause, as they deem it commercial use

According to Weinberg, 2013, artistic works are copyrightable: if you're printing an action figure or such a useless pretty piece of art, it's protected by copyright.

For utilitarian things, the copyrightable portion must be severable: if you're printing a video game controller with an artistic design drawn upon its case—not an artistic shape, but a design that could be lifted from the surface and applied as a separate artistic display—then that design is protected, and the controller that happens to be an aesthetically-pleasing shape is not (i.e. you could wipe away the design details and have the blunt shape of the thing and that would not be protected).

Purely-utilitarian things are not copyrightable. If you're printing a lamp or a cup holder or whatnot, there are no rights to extend over that.

This is important: copyright allows you to make decisions about what rights you will extend. If you don't have the right to copyright, you can't simply slap a license on something and assert you do in fact have that right. CC-NC licensing prevents you from making a derivative or a collection and selling it, but there is no right to the printed object upon which to extend to the user the right to sell the printed object. That means, conversely, that there is no right to the printed object to prohibit the user from selling it.

That actually creates some odd situations, e.g. CC-BY doesn't apply, either. You can't strip the author's name off the file and pass it off as your own, but you don't have to credit them for the physical object. It is, however, potentially asinine to do that. Even that can be a judgment call: it's likely socially-acceptable to print e.g. an ABS gear for a particular machine that strips its ABS gears and sell a repair kit without crediting whoever posted it on Thingaverse; but if somebody made a more unique object, such as a fancy planter for house plants, it might not be copyrightable as an object, but it's certainly not a copy of a gear that goes into a machine and is instead a unique creation of the user who created it.