Well i have an sx fpr and was wondering if anyone knows what size the vacuum port is. I need to buy a new one of these fittings but it has been extremely hard to find. Heres a link to the fpr.

http://www.fluidcontrol.net/pages/regulators2.html

Thanks for your guys' help

 

i think it is a 10/32 or a 5/32, don't remember. When mine broke I just called sx and they sent me one for free. It took about a week to get.