Quote:
Originally Posted by GreatOldOne
http://www.classicfasteners.com.au/T...a/IDENTGID.PDF
http://www.classicfasteners.com.au/techdata.htm
Measure the diameter of the bolt in question. If you believe it is imperial, set your vernier to measure in inches.
Then measure the TPI to identify the thread used. Then order the new ones from Namrick.
Of course, if you replace the bolt and the nut, it's much more simple. Just get the correctly sized imperial bolt, with matching nut.
If it's about 12mm, but 12mm is too small, then I'd guess it's a 1/2" diameter bolt. But measure just to be sure!
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Quote:
Originally Posted by Chris Cussen
Both UNF bolts and Metric bolts are offically identifed by the diameter of their shanks.
The table below gives the imperial name (e.g 1/4) the reading you should get on your imperial micrometer and it's metric equivilent in mm
Imperial Fractional mm
1/8 0.125 3.175
3/16 0.1875 4.7625
1/4 0.25 6.35
5/16 0.3125 7.9375
3/8 0.375 9.525
7/16 0.4375 11.1125
1/2 0.5 12.7
9/16 0.5625 14.2875
5/8 0.625 15.875
11/16 0.6875 17.4625
3/4 0.75 19.05
13/16 0.8125 20.6375
7/8 0.875 22.225
15/16 0.9375 23.8125
1 1 25.4
Sorry about the odd formatting, the sapces between the columns seem to have been reduced to a single space
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Thank you both, I'm sure that the information will help others also.
I'm off to a local small shop '
tucked away in the back streets and smelling of oil' to see if I can just buy the locking nuts.
If not I'll get the measuring stuff out and order on line.
Thanks again chaps, I can get on with it now and maybe see some progress.
