I was having problems with my screws (6-32) leaking air in my tanks, and making my cartos flood. Turns out the hole I drilled was too large. I ordered this on recommendation by another member and now my 6-32 thumb screws fit without air leaks. The package comes with a drill and tap for around $5 at Amazon. I found I don't need a t-handle with the tap, just insert the tap, maybe hold it with plyers and twirl the tube. It's super easy on the syringe tanks and easy on the poly tanks. The nylon screws I have work very well. They are cheap also. I've got 2 more batches of screws coming. (for some reason I'm obsessed with thumb screws!)
Here are some more I have ordered but haven't come yet. I'm especially excited about the multicolored ones!
Here are some more I have ordered but haven't come yet. I'm especially excited about the multicolored ones!