Nickathome
Well-Known Member
I should've known better. I needed a #21 drill bit to drill the rivet holes in my spar. So, I bought one at the local hardware store. The bit is too small. None of the holes are the proper diameter. I measured the bit and a rivet with my calipers. Both were .1520. A #21 bit should be .1590, per info listed on my drill size chart. Last time I trust hardware store drill bits.