Oil drain plug width
 

Does anyone know the width of the oil drain plug (threaded part)? I want to put a magnet on it and want to get the right size. Thanks!

10 mm / 1.5 is what mine says...so, 10 mm...looks about right looking at my spare plug

You have a spare plug, even better. Is the end completely smoothed or raised where the threads end? Can you measure the inside surface less the threads for me. Thanks.

exactly 5mm inside center without thread..from measuring with a ruler...

Your the man! Thanks!

Try this crowd. They're based in NC.

DRAINPLUGMAGNETS.COM

$35.00???? That is one expensive drain plug. But if it saves your engine, worth every penny.

I bought a rare earth magnet that will sit on top of the stock plug for $1.30.

I stuck a magnet salvaged out of an old computer hard drive (free) onto the metal part of my oil filter. It seems to work very well there, and no chance of it getting loose inside the engine!

I'm rebuilding my KLX after a balance shaft bearing failure, one thing I noticed is the oil pump is damaged due to the metal particles that fitted through the brass gauze being pump though the motor, a magnetic sump plug will not stop all the particles but will give you a good indication that something is not right at oil change time, the magnet in the filter will catch the metal that the filter would have caught anyway.