Roll Bar Diameter

[rbibb]

I"m not able to get to my plane right now nor my plans so I was hoping someone would know the diameter of the main members of the roll bar in an RV-4. I'm ordering a locking pin to make a canopy hold open latch and need to make sure I get the right length.

Thanks,

Richard
N144KT
Stafford, VA

 

[Yen]

1.5" 4130 steel, 0.049 thick. Taken from the drawings.