new packing screw seal too tight ?

Hi ! I just got a replacement packing screw for my Iwata HP-CS, and it's really tight even when i tried to put the need through it outside of the airbrush.

The needle goes through in the airbrush but it struggles to go back to its original position a bit, so there's a delay, regardless of how tight or loose i screw it back in . Is this normal for new packing screws ? or mine is defective ?

Also it is the right part, i thought i might've ordered for the wrong model, but after double checking it's the good one.

Cheers !