The following torque values are advisory only, and its use by anyone is voluntary. In developing this information, Fastenal has made a determined effort to present its contents accurately. Extreme caution should be used when using a formula for torque/tension relationships. Torque is only an indirect indication of tension. Under/over tightening of fasteners can result in costly equipment failure and/or personal injury.
No two bolts respond exactly the same to a given torque. There are numerous "real world" complications. Things such as dirt in a tapped hole, grease of oil on the threads, damaged threads, hole misalignment, accuracy of torque measuring device, and numerous other factors can alter the torque-tension relationship. Even perfect input torque can give a variation of preload by as much as 25%.
The "TERMS OF ACCESS" as posted on this website will be applicable to your use of this Torque Calculator. More specifically and without limitation, UNDER NO CIRCUMSTANCES SHALL FASTENAL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOSS OF DATA OR PROFIT, PROPERTY AND EQUIPMENT DAMAGE OR INJURY, ARISING OUT OF THE USE, OR INABILITY TO USE, THE TORQUE CALCULATOR, EVEN IF FASTENAL HAS BEEN ADVISED OF THE POSSIBLITY OF SUCH DAMAGES. In the event your use of this calculator results in the need for servicing, repair or correction of equipment or data, you assume any costs or expense for such needs.
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