Nut, Z-Axis Feed Screw 

Nut, Z-Axis Feed Screw
Part Number: 3314
Weight: 0.74 lb

Price: $68.95

In stock
Nut, Z-Axis for x3 mills

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

Item No Models
136  Grizzly G0463 Grizzly Small Mill
Harbor Freight 93885 Central Machinery Small Mill
Various X3-US SIEG Small Mill
Woodstock International M1110 Shop Fox Small Mill
Click your model to see the complete parts list.