OK, the belly mower on my little BX2200 Kubota has a shaft bolt with a stripped out head, and I need to replace it.
In the image below, it is item 050
The part number is K5371-34550, as highlighted below along with a new lock washer I was planning to get at the same time
Doing a quick search for parts on this 20-year-old tractor, I found on 3 different websites that the part has long since been discontinued, like on Messick's page below
https://www.messicks.com/part/k5371-34550/shaft-w-out-flan
The new part that replaced it is K5371-34552 is a shaft with a flange
https://www.messicks.com/part/k5371-34552/shaft-side-bla
It's about $25 for this part, and I'm sure I'll have to pay another $20 for FedEx and wait 3 or 4 days for it to get here, so I'd like to know if there is a way to make sure it's going to work before buying this new part.
Does Supersession always mean that the new part will work?
In the image below, it is item 050

The part number is K5371-34550, as highlighted below along with a new lock washer I was planning to get at the same time

Doing a quick search for parts on this 20-year-old tractor, I found on 3 different websites that the part has long since been discontinued, like on Messick's page below
https://www.messicks.com/part/k5371-34550/shaft-w-out-flan
The new part that replaced it is K5371-34552 is a shaft with a flange
https://www.messicks.com/part/k5371-34552/shaft-side-bla

It's about $25 for this part, and I'm sure I'll have to pay another $20 for FedEx and wait 3 or 4 days for it to get here, so I'd like to know if there is a way to make sure it's going to work before buying this new part.
Does Supersession always mean that the new part will work?