I just did the same job. I soaked them for a week in Kroil. tightly tapped the niple which had broken off half way. The Kroil didnt work. I then drilled for a small easy-out and the old Nipple came out no trouble at all. The original threads are 1/4 28 (miss print)but the outer diameter is larger then any nipples I can find. Looks like I will have to have one made. To bad I sold my lathe/mill combo last month.

Last edited by simcgunner; 06/19/10 10:02 PM.