Calculate tightening torque, preload and surface pressure for hex head, socket head and countersunk screws. Customized head shapes, hole chamfers, reduced shanks and materials are available options.

Based on VDI 2230:2014

Fastener where torque will be applied
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Clearance hole - ISO 273
Chamfer diameter dha I
Reduced shank
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Reduced shank diameter dT I
Mechanical properties of material, thread size and friction
Property class of screw
Minimum yield strength of screw Rp02
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Data used in calculation
Results
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