Originally Posted by Geek
I ordered an astro pneumatic rivnut tool today (with tips for 6 different sizes) and 50 Knurled, Zinc, 5/16-18x0.72 rivnuts.
Nice! The inexpensive hand tools are o.k. for aluminum riv-nuts, but very difficult to squeeze the heavier ones with them.
Why did you choose to use standard rivnuts instead of metric?