How do you determine the correct torque value for a fastener from a Navy TM?

How do you determine the correct torque value for a fastener from a Navy TM?

• A. Use the same torque as the last time
• B. Locate the torque chart for size, pitch, lubrication, and material; apply specified torque and verify with calibrated tool
• C. Guess based on experience
• D. Dry torque only

Answer: (B)

Torque values come from charts that account for how the fastener will behave in a real joint. In Navy TMs, you don’t just pick a number—you look up the chart that matches the fastener size, thread pitch, the lubrication state, and the material being joined. That chart tells you the exact torque to apply to achieve the intended clamping force. After you apply the specified torque, you verify it with a calibrated torque wrench to ensure you’re within tolerance. Lubrication changes friction, so a lubricated joint needs a different torque than a dry one, and other factors like material and condition of threads matter as well. Relying on the last torque, guessing, or using dry torque defeats the purpose of the chart and can lead to over or under-tightening. Using the chart and confirming with a properly calibrated tool gives the correct, consistent result.

Torque values come from charts that account for how the fastener will behave in a real joint. In Navy TMs, you don’t just pick a number—you look up the chart that matches the fastener size, thread pitch, the lubrication state, and the material being joined. That chart tells you the exact torque to apply to achieve the intended clamping force. After you apply the specified torque, you verify it with a calibrated torque wrench to ensure you’re within tolerance. Lubrication changes friction, so a lubricated joint needs a different torque than a dry one, and other factors like material and condition of threads matter as well. Relying on the last torque, guessing, or using dry torque defeats the purpose of the chart and can lead to over or under-tightening. Using the chart and confirming with a properly calibrated tool gives the correct, consistent result.