How to insert data in a specific sequence from one column into another column

Hi,
I have a column that contains feature codes and a column that lists the parts in the feature. I need to merge it into one column in a different workbook that lists the feature code, then below it all the parts in the feature. For all the features in a filtered list as per the attached screenshot. Screenshot 1.jpg. Can anyone assist? I need to do the same with the descriptions, but if I get the part numbers correct I can use a simple lookup for that. Please help!

I can't use concatenate because I don't want to combine the values.
A simple example of what I want to do:
Feature Codes Part Numbers
Code 1 Part 1
Part 2
Part 3
Code 2 Part 4
Code 3 Part 5
Part 6
To change to:
Feature Code / Part Number
Code 1
Part 1
Part 2
Part 3
Code 2
Part 4
Code 3
Part 5
Part 6

I use the following macro to copy the filtered range with values only into a new sheet in the correct workbook.
Sub GenericBomGen()
'
' GenericBomGen Macro
'


'
Workbooks.Open Filename:= _
"Z:\MINING SPECIFICATIONS\Mine Price List Project\Correct BOM Template To Use..xlsx" _
, UpdateLinks:=0
Sheets("Sheet1").Select
Windows("RMAA - Mining Spec List Rev 2.xlsm").Activate
Range("A5:F515").Select
Selection.Copy
Windows("Correct BOM Template To Use..xlsx").Activate
Range("A2:F512").Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
End Sub

Now I need a way to combine the columns as per the example.
I will use lookups for the other columns.