You may be right. It will almost screw into an 18650 flashlight, but it's very slightly too big. Maybe I bought it by mistake many many years ago. Or maybe it's defective.Is it a remote switch for a weapon flash light? The part on the left looks like it would screw into the base of a flashlight.
Thanks. I'm pretty sute that's what it is. I must have tossed it aside because it wouldn't fit anything. Then forgot all about it.These two look similar.
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