Since I have the rack out, I'd like to replace the phillip screws with hex screws.

Thanks

 

I don't remember the size off hand, but just take one with you to the hardware store. You'll match it up quickly as there's not a lot of choices in that size and metric.

I used allen heads but whatever you get, make sure they aren't too long. If you have all the solenoids on the rack, if they are too long they will interfere with the solenoids on the ends. The firewall side is a tight fit.

 

you need 20 m4X10mm long hex cap screws

 

Get stainless. I bought carbon steel and the darn things rusted on me.