Quote:
Originally Posted by carneades
He gave me only the N304 part as the correct part, and said that these bolts were not supposed to be torque-to-yield bolts, and that some prior mechanic likely installed those in error.
|
The necked-down capscrews as used in these applications are
not torque to yield, rather, they are tightened to a specific pre-load within the elastic range of the material. A torque to yield fastener is tightened past the elastic range and into the plastic (yield) range.
Quote:
|
I'm guessing the part # for the split is the A112 number listed in the catalog. I'm tempted to order it for science, but it goes for between 60 and 80 bucks. If I knew it was the correct part, I'd gladly pay for it, but I have no idea what to think now.
|
A decided waste of money; the necked-down version has been superseded.
Quote:
Originally Posted by Frank Reiner
At five threads engagement 86% of the ultimate thread shear strength has been reached. A torque of 28 lb-ft is approx. 60% of the max. that could be used with that bolt. Hence, well within the torque vs. shear limits.
|