I think I have an old Rainman UC kit without a recess for the screw head. I think it uses a 1" length screw?
I will double check that for you though.
Edit: Yes I used a 1" brass 8-32 screw for the older style Rainman U/C kit, BUT...I had to use a small brass nut and a small washer to make sure that it fit properly without going into the breach. The nut it probably 1/8" and the washer is probably 1/16"
I also had a 3/4" screw but it was just a shy bit short to stay in place while pumping.
Last edited by Stilgar; 04-17-2010 at 01:27 PM.