Can anyone shed some light on this problem I have, the material is fine in designer, the graph scales up and down res no problem see below.

But when I import the sbsar to Unreal I get this problem below, the substance scales fine but the bolt does not.

Here is a normal when imported into unreal

Has anyone come across this problem before? It is probably something simple that I have overlooked.
1. All graphs are set relative to parent and scale no problem in Designer.
2. The bolt is from a normal map created in Substance Painter that contains all the bolts for this object (similar workflow as Wes and his vehicle paneling from GDC presentation 2014) and combined with the Designer normal map, all instances of this bitmap input have been locked to 2048x2048
Thanks in advance
Kel