UHMW is my choice for just about everything. You wouldn't need the self
lubricating charicteristics for what you are doing. Nylon would work fine.

Neither one has any UV inhibitors though.. I'm not sure which other plastics
might have this.. If your fitting is mostly enclosed then UV wouldn't be a
factor. (my Aries windvane has nylon bearings and spacers but only the edges
have deteriorated over 25 years of exposure).

Nylon machines cleaner than UHMW but both can be frustrating to achieve an
acurate final dimension because of the flex and give.. This can be overcome
by using a modified tool angle, etc. I'm not a machinist so I just
experiment with this..

A fine finish is very difficult to achieve on UHMW.. You can't file or sand
it.. A sharp tool and a slow feed will help.

In the end, for bushings, this stuff is great and even if you do a sloppy
job of machining, you can just split the bushing and use clamping force to
adjust the clearance/fit.

If you don't have access to a lathe or milling machine, you can still do a
lot in a drill press.. I use Forstner bits for a nice clean hole of the
larger sizes. I have also use hole saws to rough out holes.

The UHMW is easy to tape/thread and if your part is thick enough, the
fasteners hold very well. It would be difficult to measure final torque with
this material and I suspect you could strip threads if your not careful.


--
My opinion and experience. FWIW

Steve
s/v Good Intentions