I was replacing my handlebars and stem. I have an ITM Eclypse quill stem. Using a torque wrench I start tightening the stem bolt that tightens down on the bars. WHen I get to about 100inch.lbs I am tightenening but the torque is not increasing. After a couple of turns like this I hear that frightening plink sound and the bolt has sheared off. I was certainly not overtightening and eveything was cleaned and greased. What could have caused this? Just a bad bolt?