Horn button contacts steering shaft with NRG steering wheel hub

[Henness]

I have a 1972 240z I swapped the steering wheel out with a Sparco steering wheel and an NRG steering wheel hub. I'm not able to push the horn button that came with the Sparco steering wheel all the way into the hole because the horn button terminals contact the steering shaft and ground the horn circuit causing the horns to blare. Is this a common issue with the NRG hub or is this because I chose a Sparco sterring wheel? I don't see how using a different steering wheel would change anything though because the steering wheel would be mounted in the same exact spot. So maybe other brand steering wheels have lower profile horn buttons that don't contact the shaft on the back side? Am I alone in this problem or does someone know of a horn button that would work?