Drain plug 3/8 +/-

   / Drain plug 3/8 +/- #12  
You didn't say what this is. 3/8" pipe size or head size? Possible that it is a 10 MM or 7/16" ? Evac it through the dipstick or drain via the filter are other possibilities.
Slightly larger than 3/8" is 10mm. (0.393" to be exact). 7/16" = 0.438"
I think he is trying to use the 1/2" (square) drive end, not the actual socket end.
I've done this before with square heads plugs, nuts.
 
   / Drain plug 3/8 +/-
  • Thread Starter
#13  
I think he is trying to use the 1/2" (square) drive end, not the actual socket end.
I've done this before with square heads plugs, nuts.
Correct. It is a square 3/8 head and I am using the drive end of an extension not a socket.
1641391605870.png
 
   / Drain plug 3/8 +/- #14  
Yes, I've done same with a socket where you can find the right 3/8 drive 12 point socket that will fit on a 3/8 drive ratchet.
The socket is less likely to round out than the plug.

Trying to recall where I have seen plugs with recessed square heads? Conduit plugs?
 
   / Drain plug 3/8 +/- #15  
They make sockets for plugs- Of course, I found this after chewing one into oblivion so now I have a set.

1641393360298.png
 
   / Drain plug 3/8 +/- #16  
They make sockets for plugs- Of course, I found this after chewing one into oblivion so now I have a set.
Looks like you got the last one... :unsure:
 
   / Drain plug 3/8 +/- #18  
I have a lot of tools but it just never occurred to me that I really needed one until I had one really seized up. I went to Lowes and nothing. Seemed odd that I never ran across them before but sure enough, I found a set and bought them. I paid a hefty price to replace that d*&^ vent tube coming out of an Onan generator. It was something I didn't know existed much less to open it and clean out the soot periodically.
 
   / Drain plug 3/8 +/- #19  
   / Drain plug 3/8 +/- #20  

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