Structural joints bolts

Bolts – Snug tight, TF, TB or not TB?

Bolt Tensioning

Bolts used in structural joints are designated by; Diameter Grade Tightening procedure. For example, an M20-8.8/S bolt is: 20 mm in diameter with a metric thread, the ultimate tensile strength is 800MPa and the yield strength is 640 MPa (8.8 translates to 8x100x0.8=640), and it is tightened to (s) “snug…

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