DynoDave
CO-ADMINISTRATOR
Motown Mopar-Wizard
Posts: 11,169
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Post by DynoDave on Jun 29, 2014 9:33:43 GMT -5
Tech 101 – Thread restoration and workarounds on existing hardwareHEMMINGS
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Admin
FORUM OWNER
Posts: 6,891
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Post by Admin on Jun 29, 2014 12:59:56 GMT -5
Most informative part of the article:
"Often, U.S. threaded holes can be oversized using a metric tap (and matching bolt) of a slightly larger size and vice versa. Five-sixteenths-inch diameter threads can be tapped to 8 mm, 3/8-inch threads can be oversized to 10 mm, 5/8-inch bolts can be tapped to 16 mm, etc. This doesn’t apply to all U.S. sizes. For example, it would be difficult to find 13 mm hardware to replace a 1/2-inch bolt, but there are close equivalents that allow this switching between continents to be successful when repairing some threads"
And they are absolutely correct about "fishing" out a broken tap...rates right up there in difficulty with a broken drill bit, a broken easy-out, and a broken-off drift punch (or in one "I'll never try that again" sad incident: a broken off screwdriver shank !!....don't ask.
Good article, Dave.
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