The stud extending from an original 1940 Ford brake pedal pad measures .525" and an 18 pitch gauge fits it perfectly. What is the thread?
Orphan Bolt Thread
Dec 05, 2008
6 Replies
At a guess I would have suggested 1/4" American National Standard Straight Pipe thread but it may have been a precursor as I don't think the American Standards had been introduced in 1940.
Sounds like 1/4 in pipe or 9/16-18 UNF. Paul K. Dickman
Could it be simply a badly worn 9/16-18?
Pete Stanaitis
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John Kunkel wrote:
That would be my guess.
If there isn't a good Ford restorer's newsgroup I'm sure there's some good forums -- and there's plenty of early V-8 enthusiasts out there that could quote you chapter and verse of the specs.
Bob Drake Reproductions may make this (if they've gone beyond _just_ rubber goods). Or send an email to Karl at Wescott's Auto Restyling
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He'll know if you can get his attention, and if you're looking for a new pedal he will have one, or know where to get it.
Up until the 70s Ford was absolutely "ANAL" about their machining, I would imagine 17/32" 18TPI "V" thread. You may want to check the thread angle (3 wire method using 2 different sizes) to see if it's really 60 degrees...
Take that, copiers and SAE!
Matt
Ding!! Give the man a cigar, it's 1/4"-18 straight pipe thread. Who woulda thought?
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