Torque Spec Calculator

Grounded in SAE J429 Grade 8 tensile strength. Star-pattern tightening. Three-pass verification. Because a wheel walking off hub kills.

Close-up of steel hex bolts in bulk

Grade 8 Fastener Profile

PropertyValue
Tensile Strength150,000 psi (1,034 MPa)
Yield Strength130,000 psi (896 MPa)
HardnessHRC 33–39
MarkingsSix radial dashes
Source: SAE J429 Standard • ASTM F3125

Input Parameters

Results

Enter parameters and calculate to see target torque values.