Answer :

The specific calculation of the bolt stiffness of a steel bolt with dimensions M20x2.5, 57 mm length, and a grip of 29 mm would require the modulus of elasticity value for the steel material used in the bolt.

Bolt stiffness is determined by the material properties and dimensions of the bolt. To calculate bolt stiffness, we need to consider the cross-sectional area and length of the bolt. The cross-sectional area can be calculated based on the thread size (M20x2.5 in this case) and the grip length (29 mm). Using the appropriate formula for the thread size, the cross-sectional area can be determined. Once the cross-sectional area is known, the bolt stiffness can be calculated by dividing the modulus of elasticity of the steel material by the length of the bolt. The specific calculation would require the modulus of elasticity value for the steel material used in the bolt.

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