What does bolt grade 8.8 mean?
The first number (8) multiplied by 100 gives the nominal tensile strength (800 N/mm²). The second number (.8) multiplied by the first gives the yield strength (800 × 0.8 = 640 N/mm²).
Calculate tensile and shear load capacities, tightening torque and safety factors for metric bolts according to ISO 898-1.
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The first number (8) multiplied by 100 gives the nominal tensile strength (800 N/mm²). The second number (.8) multiplied by the first gives the yield strength (800 × 0.8 = 640 N/mm²).