I have been trying to find the specifications on the T45 T48 and T51 left hand rope threads. They are used on the drilling extensions on rock drilling equipment as well as on the drill bits themselves. I have tried to find the ISO spec on this but I only come up with the specs. for the smaller threads. I have already ordered a spec. from the ISO for left handed rope threads but it turns out that it only covered the smaller threads and I was out the money I spend for the spec. I have sent emails to the ISO and have not received any response.
I am looking to find where I can get the specs. or get the right number to order them from ISO. IF anyone has a copy of them or the proper spec. number I would be very thankful for the information.
thanks,
John