Wolverine storm on tank reg

[ikarma70]

Hi guys this sounds like a silly question but how far should I screw my storm reg down on the tank valve?

 

If I screw it down till it stops, it destroys the tank neck seal, it does this on both of my tanks and it does it regardless of if I use rubber, nitrile or urethane seals lubed or unlubed.

 

The inside of the reg threads look and feel smooth.

 

Any ideas guys?

 

TIA

Andy

[ikarma70]

Sorted, faulty regulator!