Anti backlash nut for 8mm ACME Lead Screw

This is the printable version of [Openbuilds anti-backlash nut](http://openbuildspartstore.com/anti-backlash-nut-block-for-8mm-metric-acme-lead-screw/) for the 8mm ACME lead screw. The first time you thread the screw, it will be really tight. You will need to moved thread and unthread the screw a couple of times to get it moving right. Use a M4 screw on the smaller screw hole to adjust the tightness of the nut. Not absolutely needed but some Silicone lubricant on the insides work well.