How do you attach the standard short Belgian flash hider?

[1886nut]

In photos its looks like these are all attached with the flats on the sides of the flash hider sitting vertically. When I hand tighten mine on the left hand threads, the flats only wind up just past horizontal.

Am I supposed to put a proper fitting wrench on the flats and turn the flash hider as hard as I can the remaining 80 or so degrees, or will this strip the threads? And if not, how do I lock the flash suppressor in place and get it nice and symetrical? Epoxy on the threads?

Information

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[The Wizard]

Actual, the indexing feature is the bayonet catch notch. It should be at the 6 o'clock postiton. There should be some misalignment when hand tight but 80 degrees is too much. I suggest spacer washer.

[1886nut]

These threads are very fine. Whats the proper amount of takeup, in degrees? Am I supposed to put a conventional wrench on the flats, or use a belt and a strap wrench?