How much torque is 80 in-lbs by hand without a torque wrench?

To estimate 80 in-lbs of torque by hand without a torque wrench, you can use a rough guideline: applying pressure with your fingers and thumb can generate about 10-15 in-lbs of torque. Therefore, you would need to apply a consistent force of about 5-8 times that pressure. It's important to note that this method is not precise, and using a torque wrench is recommended for critical applications to ensure proper torque specifications.