I have been using loose brass inserts as nuts for mounting my BLTouch because regular nuts can be really difficult to put on.  I have had problems of dropping the inserts when trying to install or remove them.  I made this to embed the inserts in and then can easily hold them in position to tighten without dropping them.

Brass Inserts: https://www.amazon.com/gp/product/B01IYWTCWW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1