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K values: waxed (e.g. pressure wax as supplied on high strength nuts) = .10, hot dip galvanized = .25, and plain non-plated bolts (as received) = .20. Torque has been converted into ft/lbs by dividing the result of the formula by 12; All calculations are for Coarse Thread Series (UNC).
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To convert pounds (lbs) to Newtons (N), multiply by 4.448 To convert inches (in) to millimeters (mm), multiply by 25.4. Note: When using Zinc Plated (lubricated with wax) Top Lock Nuts, the K value can vary be-tween 0.12-0.16. For additional technical information, contact Fastenal Engineering at engineer@fastenal.com.
TIGHTENING TORQUE GUIDE based on IFI 5th Edition Technical Data N-12/N-16, using Equation (1) and a torque coefficient, K-0.20 for non-plated steel fasteners and K-0.15 for plated fasteners.
You can use this free torque conversion calculator to easily convert a range of torque measurement units including pound-force inches, Newton meters, kilogram-force centimeters, ounce-force inches, kilogram-force meters, among others.
24 Ιουλ 2024 · Torque (Nm) = K × D × P. Where "K" is the torque coefficient, "D" is the nominal diameter of the bolt, and "P" is the bolt's clamping force. This helps determine the right torque for secure fastening. The bolt torque calculator helps you make sure you tighten your bolts correctly.
This calculator can be used to calculate the force acting in a bolt. T - torque (Nm, lb f ft) K - constant. d - diameter bolt (m, ft) torque reduction due to lubrication (%)
Torque-Tension Relationship for A307A, Grade 5, 8 & 9 Bolts. The torque values can only be achieved if nut (or tapped hole) has a proof load greater than or equal to the bolt's minimum ultimate tensile strength. Clamp load calculated as 75% of the proof load when specified by the standard. ASTM A307 utilized 75% of 36,000 PSI.
