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PostPosted: Thu Sep 20, 2012 2:05 pm 
retrobike rider
retrobike rider
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Joined: Sun Dec 18, 2011 10:42 pm
Posts: 2189
Location: milton keynes
Couldn't you just get them painted or electroplated gold

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PostPosted: Fri Sep 21, 2012 1:43 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4332
Location: Herts UK
Bobzilla wrote:
eastsidebikes wrote:
Bolts are best specified by outside diameter of thread x thread pitch. Thread pitch for metric bolts is how many mm between threads.

I thought it was the depth of the threa rather than the distance between. So for internal threads you can measure the internal hole (including the thread) and then take an educated guess, so if your hole is metric and 8.75mm wide, its going to be an M10x1.25 thread. Useful if you can get a verier caliper or a hole guage in, but not a thread guage. Just measure it accurately.

no, it is the pitch - you would need to look up the ISO drawing or whatever but it so happens, either by coincidence or design, that the minor diameter i.e. the hole you would drill is more or less the same as the major diameter less the thread pitch.

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