Head/tip is huge, at least 3/8 inch in diameter and 1.25 inch long. Not ideal for what I got. Honda B-Series (turbocharged) engine. It doesn't even fit my motor's sensor hole so I can't use an adapter. I'm going to drill a larger hole in the filter sandwich plate and tap new threads to make it work. The nut is about 1/2 inch in diameter and all adapters are larger than this. Definitely not ideal, but it will work. Maybe use an electric gauge on small Japanese motors, believe me the electric ones are smaller. Maybe it's for people who want to drill a hole in their block or a big engine block?
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