3/4 hat flange

Anyone know where to get a hat flange that I can connect a 3/4 scat tube to? Looking to add a blast tube to my alt since I have gone through 3 alts in 6 months. Tried the usual places, spruce, ect...

Thanks,
Jason

I am installing a 1" from ACS after reading in the Plane Power Instructions to provide a 1" blast tube. http://www.aircraftspruce.com/catalog/appages/ductflanges.php?clickkey=12947 . Unfortunately they do not stock a 3/4"

no hat flange necessary

I used Vans ribbed conduit for cooling air to the alternator. Drilled the baffling ramp the smaller diameter of the ribbed conduit and the ribbing holds it in place. A dab of RTV to keep it from turning and used a heat gun to shape the conduit to provide air to where it is needed.

There was someone on the forum making and selling 3/4" flanges for blast tubes. That was a while back, so they may not do it anymore. You may want to check with cleavland tool, if they are available, those guys would probably know. They may even start making them if you ask.