Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3617240.
When I was a kid, my dad brought home a set of Craftsman battery powered yard tools (weedeater, hedge trimmer, blower). Back then, battery powered tools were just coming out and these used an external battery pack. The pack was a hard case with a handle, a shoulder strap, a charging jack and a cigarette lighter socket, into which you would plug the power tools. They built things to last back then. My dad is passed, but I still have the tools and one of the battery packs. After replacing the internal battery (a standard 12 sealed lead acid battery), I decided that I could use this for other things around my shop. I wanted to be able to easily tap into for uses where there wasn't a cigarette lighter plug, but I didn't want to modify the case.
This adapter plugs into any standard cigarette lighter socket and brings the voltage out to two 1/4" bolts that you can use with bare wire leads, clips or spade/lug connectors.
I've had the plugs in my inventory for years, so I do not know the exact specs, but I think the threads are pretty common to this kind of plug. You should be able to use this with just about any cigarette lighter plug that has a screw on end.
NOTE Due to either a Thingiverse bug or (more likely) shadowbanning, my models no longer show up under the [Newest] listings. If you want to see more of my models, please be sure to 'follow' me. If you print this, it would really help if you'd post a 'make' so that others could find this model.