Label, Normal/Fine Feed 

Label, Normal/Fine Feed
Part Number: 2115
Weight: 0.02 lb

Price: $0.95

In stock
Label, normal/fine Z-axis feed

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

Item No Models
117  Harbor Freight 47158 Central Machinery Micro Mill
Clarke CMD10 Metalworker Micro Mill
Various X1-US SIEG Micro Mill
79 4660 HiTorque Micro Mill 4700 HiTorque Micro Mill
Click your model to see the complete parts list.