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Minimum engaged length so the internal thread strips at or above the bolt fracture — for blind/tapped holes and softer materials.
Bolt tensile capacity = stress area × Rm (from property class). The internal thread strips in shear at ~0.58×Rm over an engaged area ≈ 0.55·π·d per mm. The engagement length is set so the internal thread is at least as strong as the bolt — so the bolt fails first, not the threads. Reference estimate; confirm critical joints against the drawing.
Bolt tensile capacity
60.31 kN
Minimum engagement length
13.4 mm
Engagement ÷ diameter
1.34× d
Needs more than a standard nut — use a thicker nut or deeper tapped engagement.