I think the following pic suggests 24tpi...
I measure od as 0.465" or 11.83mmWhat's the thread o/d?
Plus that photo suggests 20tpi doesn't it?
You are correctPlease could you write down what makes you think that.
To my eyes, you are measuring five thread pitches over a distance of 1/4". That means 5 x 4 = 20 threads per inch.
You do not count the thread tips, just the gaps between the tips. Alternatively, if you do want to count the thread tips, you have to call the left hand one 'zero'.
This is where i was heading, but seems to head into uncommon sizing1/20”, or 0.050” pitch equates to 1.27mm, so 20 tpi makes more sense.
Nearest inch size to 0.465” is 15/32, which sounds revolting. More likely fine M12x1.25.
Sort of, power steering rack transfer pipe as per my other threadLooks like a brake pipe nut - for 1/4 pipe could be 7/16x20 UNF or M12x1.
Classic Saab 900.What vehicle or what make of rack? that would give you a good idea if its imperial or metric I would have thought
Close. SaabVolvo pas rack by any chance?
I used these,
I had to run a drill through them, thought it was because the pipe was slightly corroded but it might have been 1/4" tube?
If that was actually the case (and I had known I was going to have to drill them anyway) I would have bought the 3/16 version as they are cheaper..
My metric pitch gauge is paired with whitworth, misplaced my unf/unc one......I think mrhaynes needs to get himself some examples of these different threads in both nut and bolt - but not cheap chinese junk that has a thread engagement of about 20%!
‘Go-no go’ gauges have been around for as long as testing has been.
Most certainly he would have (immediately) found that neither 1.0mm pitch or 24 tpi were appropriate.![]()
Cheers.If you are sure it's 1/4"
I measure od as 0.465" or 11.83mm
Having now googled -4AN, another size showed up - 1/8 NPTIts pointing more towards -4an which is common in steering components.
Bob