Bolt Torque / Preload Calculator
Inputs
Thread Type
UNC
UNF
Thread Size
SAE Grade
1
2
4
5
7
8
(+) Torque Tolerance
%
(-) Torque Tolerance
%
Thread μ (min)
Thread μ (max)
Head μ (min)
Head μ (max)
Specified Torque
in-lb
Results
Diameter
in
TPI
Tensile Area
in²
Proof Stress
psi
Yield Stress
psi
Tensile Stress
psi
Proof Load
lb
Yield Load
lb
Tensile Load
lb
Minimum Preload
lb
Maximum Preload
lb
Preload / Proof Load
max
Preload / Min Tensile
max
Nut Factor K