Nut Encasement

This is a casing that fits onto an M4 Nyloc nut to make it fit snugly into a cavity that's too big for it! It can be resized for any nut.

I'm printing the metric/"international" version of the [MPCNC](http://www.vicious1.com/), using 25mm pipe. And although it's all marvellous, there is some difficulty with the fittings that grip Nyloc nuts, which are meant to enable you to tighten them in place. Specifically, the hex-cavity for the nuts were originally designed to hold US/Imperial #6-32 (3/1