jhearl Posted June 17, 2015 Share #1 Posted June 17, 2015 This question may be a bit "out there" but I am wanting to make a part on the boat I'm building that is a (approximately) 1mm diameter rod with threads on each end. I can't use all-thread for it because most of it needs to be unthreaded. I've searched around on the web and found any number of jeweler's tap and die sets in the 0.6mm & up range. That would work fine. But I was thinking to use some hex nuts from Scale Hardware. It occurred to me that I could wind up with a die that cut a different number of threads per inch than the hex nuts were tapped for. None of the suppliers I've found for dies mention the number of threads per inch - nor does Scale Hardware. I sent an email to Scale Hardware and got a quick and helpful reply as follows: "Metric threads are measured by pitch (the distance between two threads) rather than threads per inch. I can say the .6mm thread is approximately 169 tpi and the 1.0mm thread is 102 tpi. " I've sent an email to the Otto Frei company (one of the suppliers of jeweler's taps & dies) but haven't heard back from them so far. Since they are just a seller, not a manufacturer, they may not know the answer. So, I thought, just for grins, I'd ask if anyone here might have tried using a jeweler's die and matching it with nuts from Scale Hardware? It might seem like all metric dies are the same, but the Otto Frei page says "Jeweler's tap & dies sets have broader threads than watchmakers or machinist taps & dies, which have finer threads." http://www.ottofrei.com/Swiss-Made-Colibri-Jewelers-Screwplate-With-Taps-Set.html So I'm worried that the two could be different. Of course, I can, if forced into, struggle to make my own nuts, but I know they won't look as good as those from Scale Hardware. Thanks in advance - John mtaylor and thibaultron 2 Quote Link to comment Share on other sites More sharing options...
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