All fastener stretch when tightened ... than you are attempting to reuse the originals. TTA bolts, however, are reusable for a few torque applications. GM LS and LT engines use TTA bolts for ...

Something a lot of weekend wrench-spinners overlook is “torquing” their nuts and bolts. Torque values for fasteners are called out in every shop manual…but does bolt torque matter?

Most engineers who deal with bolted joints are familiar with torque tables for SAE-grade bolts, but these are all too often used without regard for the yield strength of internal threads or the ...