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On my 38 Es2 , I tried to drain the oil and discovered the bolt head was rounded. Once off I had the tank flushed ( grungy )
Now I need to replace the Tank drain bolt.
What is the correct size that I need and who sells them ?
Andover,RGM & the NOC sell thew 3/8 drain bolts.
Thanks
The head size on my 39 16H…
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The head size on my 39 16H is 5/16Whit. But without draining the tank I can't confirm the thread (is it an undersize head to discourage over-tightening?)