Quick update on my Big Air mirror extension. Still love the mirror and it does everything I want, except it does hang a bit low when we are anchored in the cove and sometimes I’ll hit my head on it. The solution is to pivot it upwards and out of the way.
The angle of the mirror is adjustable via a 10mm bolt with a hex wrench. It was getting annoying to dig out the wrench every time I wanted to pivot the mirror upwards. I went looking for a suitable knob with 10mm x 1.5 pitch threads.
Here are the two I found that both work. They are both stainless steel, because I couldn’t find any in aluminum to match the metal of the mirror. Hopefully over time they won’t corrode due to dissimilar metals.
In any event, the new knob works great and makes it a cinch to adjust the angle of the mirror on the fly, or even remove it. I will say that I can’t get it quite as tight as when I used the original hex wrench bolt, but it’s tight enough to be solid while boating.
I did have to cut off the excess thread length of the knob to match the original bolt, but only took a minute with a Dremel.
Here’s the knobs I used. Two versions, one with 7 point grip and one knurled. Both work fine.
McMaster-Carr
303 Stainless Steel Knurled Knob
with M10 x 1.5mm Thread 76mm Long Stud
McMaster-Carr
303 Stainless Steel Seven Arm Knob
with M10 x 1.5mm Thread 30mm Long Stud