I would use a caliper to measure the hole size and size the pin accordingly. If you do not have one, these are relatively inexpensive and can be purchased from Amazon or an auto parts store. Wood working stores also sell them which I have purchased from them for my needs.
Now the pin might be a shear pin to prevent damage to the motor if this is on the cross shaft to power both legs down and up. I had always carried a spare for my Cougar front legs as the pin had failed once in the past so, I would be prepared if this happened again.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 145K+miles