Interesting Fox. I just googled it and JIS stands for ”Japanese Industry Standard”. Hopefully we won’t find them on our “Stovebolts”.

I do know what you mean about stripping screw heads. Now I know what to look for.

https://chapmanmfg.com/blogs/news/phillips-bits-vs-jis-bits-whats-the-difference

Thanks Fox!


Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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