Ford 4000 hydraulic oil level plug

mds428

Member
On a 1968 Ford 4000 tractor, can someone provide the part number for the correct square head plug that is used to check the oil level?
a172158.jpg
 
" think that is just common pipe tread (1/4) and should be easy to find...square or hex head."

Wrong.
That plug is 3/8" fine (SAE) thread. Also described as 3/8-24. Plug part # 81813309 washer part # 81802074. Or use a 3/8x1/2 NF capscrew with a copper washer under the head.
 
Thanks for the help guys! I really appreciate that. This was my first post, so sorry I didn't know how to credit the original photographer. And yes, it is definitely 3/8 fine thread, not pipe thread.
 

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