When it comes to mower blade bolts, it is important to ensure they are tightened correctly. It’s essential that the bolt be tight enough so that the blade won't come loose and cause damage or injury, but not too tight as this can lead to cracked blades or other damage. The best way to determine how tight your mower blade bolts should be is by consulting your manufacturer's manual for specific instructions; typically, it will recommend a torque setting for securing the bolt in place. To achieve this optimal level of tension, use a torque wrench which allows you to accurately measure and apply force when tightening the nut on each side of the bolt. Additionally make sure that all nuts are securely fastened before operating your mower—loose bolts may cause serious accidents if they become dislodged while you're cutting grass!