Looking for Oil Drain Plug Size

[dmf6978]

Hi Everyone. Looks like the previous owners, or hack mechanics didnt properly remove the oil drain plug bolt, and its semi rounded off. I need to replace the oil and at the same time I think it probably could use a new gasket. With that being said any idea the thread size, so maybe I can find a generic one, or do i need to go hunting for something used that is not painted red.

1967 1200B Pickup with a hefty 304 engine.

 

[1975IH200]

Take the plug out and measure the threads.

 

[Winchested]

Should be a 1/2-20

 

[dmf6978]

Thanks for the help. I bought the gasket already from IH PARTS. I will need to read my manual on how much it takes to fill it up.