Haven't got it ? Need a special size i.e. WHITWORTH ....Then > MAKE YOUR OWN ...
FIND A NUT OR BOLT of the size you need ...One from out of the motor is best i.e. Crank or Head etc , because they are hardened more than regular bolts . Split the nut with an angle grinder [ DO NOT CUT IN HALF ] . Now with a good file or DREMEL > make 3 grooves [ 1 at the split ] equally spaced in your nut or on the bolt thread . These will remove metal chips . Now hold the piece that needs threading in a vice . put the NUT or BOLT in/on it .The split will allow the nut to flex/ open & the bolt can be tapered on a grinder ... Grab NUT or BOLT with a VICE -GRIP & rotate this will cut the thread . Repeat process [ tighten VICE - GRIP ] until you have cut to the desired depth [ Keep trying an unmolested NUT or BOLT until you have desired fit ] ... , Lubricate with oil as you are cutting & use light pressure with vice grip for final cut , to get a nice clean thread ...PRACTICE MAKES PERFECT ...
That is a really great tip. Thanks for posting.
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