I would like somebody to model the part again and put it on the site so that eveybody can use it beside me. thank you for your help.( sory my english is not so good as yours)
you are on the right track almost there, create the helix on the outside diameter and the thread section as shown in attached sketches, have included the solidworks file but its 2015.
AttachmentsKnuckle Thread DIN 405 -1.SLDPRT, 1.41 MB
Thank you john fall, well done. I can not think that.You way is very interesting and is very usefull. thanks again for you help.
second image should be as shown in attached