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?
- posted
15 years ago
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?
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
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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