Head bolts for 1946 HD 25

[mark76]

Hello!
I broke off two head bolts, drilled and retapped. What type of bolt should I replace with? Will any steel bolt from the hardware store work? Stainless steel perhaps?

[frankr]

You might be surprised to learn that stainless bolts in aluminum corrode in place worse than steel bolts do. The only advantage is the heads don’t rust.

I’d use Grade-5 bolts, from a "real" hardware store if you can find the right length. The non-graded ones from the big-box stores are real weak, but they might be strong enough, since they don’t require a ton of torque.

[Author]

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