Galvanized pipe - do brass brass fittings need an adapter?

Factual Questions
1

It’s been about twenty years since I worked with galvanized pipe (water line).

I seem to recall the pipe fittings (T’s and Elbows) have courser threads than brass fittings. I can’t seem to find a galvanized to brass adapter on Lowes or Home Depot’s web sites.

can this 3/4 in. Brass MPT x MHT Hose Adapter screw directly into a galvanized 3/4 elbow? Yes, I know MPT means Male Pipe Thread. But, is that for steel threads too?
http://www.homedepot.com/h_d1/N-5yc1v/R-100638192/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=3%2F4+hose+adapter&storeId=10051

Brass is such a softer metal. And their threads look much finer than steel pipe threads.

2

Pipe threads are all the same for steel, galv, brass, and plastic.

3

The only thing I remember for sure is not to used galvy fittings on black iron. But I never saw a difference in threads for pipe.

4

Ah, it was black pipe that’s different.

We have a older hardware store here that still cuts and threads pipe. I can tell them what length I need. I have threaded pipe myself thirty years ago. A manual threader that grandad had. Lots of oil and lots of elbow grease turning the cutter. Haven’t seen that tool in over 25 years.

5

True story: I once had to cut 6 pieces of 4" rigid conduit with a hacksaw (30 minutes per cut), then thread both ends with a pony threader. It took all 200 pounds of me to hold down the drive handle, and threw my skinny helper clean off. Biggest pain in the ass, ever.

6

Brass to galvy is pretty common. It’s copper to galvy that can’t be done as the copper will corrode from electrolysis.

Just put a couple wraps of Teflon tape on that brass adapter and snug it down,and all should be well.

The snag with black pipe it that it’s often threaded with a straight thread instead of the taper of a normal pipe thread. No idea where that convention came from.