ajchien
Well-known member
10mm
1/4 & 11/32" - give y'all any hints?
Used to be 1 1/8 = Prop shaft nuts on outboards. Now it's a 10mm.
10mm, 12mm, 14mm, 17mm, 19mm

Well it's been covered but I'll put it this way. I never pass up a chance to buy a 10mm anything at a yardsale pending a decent price.