Doubt you’ll find a part number. First one I replaced in a quick attach, I had to first identify the size of the quick attach. (See chart below or find online reference if the below doesn’t match up with what you have.)
I was dealing with a 1/2” Pioneer at the time and somewhere found it took a 117 Buna-N 70A durometer (hardness). It’s been working for the past couple hundred hours so apparently it was right for a 1/2” Pioneer. For whatever reason I don’t recall, I also noted a 1/4” Pioneer is a 113.
So, to my knowledge, which is not great, you have to research it to figure it out yourself if the above didn’t help you and no one else chimes in.
I got a bag of about 50 117’s for maybe $5 or less. Took about 5 minutes of fiddling to change it out.
If you’re not looking for the o-ring for a female quick connect, my apologies for the lengthy answer.
