Quote:
Originally Posted by Dynomite
Oil Pan Drain Plug (14 mm Box wrench).....38 ft-lbs (5/8-18 Thread).....actually a bit less torque with a bit of Permatex on the washer/threads.
I never use a torque wrench on Oil Pan Plugs.....just a 14mm box wrench and pull about "this" much which is not too much 
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Hello Cliff - Engine Oil Drain Plug is by design a 9/16" HEX
Yes to the short pipe wrench suggested by Jerry if the OP has issues.
I have a few NOS Drain Plugs and maybe a couple of the Magnetic Inserted.