Guest Buick Posted October 27, 2005 Share Posted October 27, 2005 Hi All,I am making some new king pins for my 1916 D45, and I was wondering what is the specification of the screw thread that is found on all the grease/oil lubricators on the car. It is about 0.41 inch outside diameter and 26 threads per inch. Best wishes to all,Buick Link to comment Share on other sites More sharing options...
Layden B Posted October 28, 2005 Share Posted October 28, 2005 Most grease fittings are 1/8" pipe thread. Link to comment Share on other sites More sharing options...
Guest Buick Posted October 28, 2005 Share Posted October 28, 2005 Hi Layden,The diameter is dead right for 1/8 inch American Pipe thread, so thanks for your suggestion. According to my data book the pitch for Am Pipe is 27 tpi. My gauge seems to fit OK at 26 tpi, which is what threw me off the scent, but the diameter is so close that I am sure that you must be right, (and I don't have a 27 tpi gauge).many thanks!!Buick (from the UK) Link to comment Share on other sites More sharing options...
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