T8 Lead Screw Nuts

When trying different lead length screws on the Z axis of my MK3 Bear it was impossible to find POM nuts the right size for anything other than 8mm lead. So naturally, I made my own. I have found the nuts last 6-12 months on my three machines, but I recommend always printing a few extra pairs to avoid having to do the machine setup and material prep too frequently!

I printed these in a nylon material - [Essentium PA](https://essentium3d.com/product/essentium-specialty-pa-nylon/) If you use something else that works out well, do let us know in the comments! Just keep in mind that the screws are not usually hardened and you want to make sure you are using a low friction material to avoid wearing the screws down. The nut should be the consumable half of the setup!

Material Prep: Get it dry! I used a vacuum chamber for 12 hours with the PUMP ON. Stored with a liberal quantity of desiccant and fed to the printer in a [SpannerHands MK6](https://www.thingiverse.com/thing:2839275)

Pri