Support, Z-Axis Screw 

Support, Z-Axis Screw
Part Number: 2171
Weight: 0.14 lb

Price: $8.28

In stock
Support, Z-Axis Screw

In your instruction manual, this part appears on the parts list as:

Item No Models
82 4660 HiTorque Micro Mill 4700 HiTorque Micro Mill
96  Harbor Freight 47158 Central Machinery Micro Mill
Clarke CMD10 Metalworker Micro Mill
Various X1-US SIEG Micro Mill
Click your model to see the complete parts list.