Tightening torque for screws Centre screws with internal hexagon Screws with internal hexagon Screws with torx Special screws with torx plus Thread (M) M3 M4 M5 M6 M8 M10 M12 Key width (S) 1,5 2 2,5 3 4 5 6 Strength Class 14.9 (Moment / Nm) 0,82 1,9 3,5 5,5 9,5 14,3 30 Thread (M) M3 M4 M5 M6 M8 M10 Key width (S) 2,5 3 4 5 6 8 Strength Class 8,8 - 10,9 - 12,9 (Moment / Nm) 1,1 2,5 5 8,4 15 15 Thread (M) M2,5 M3 M3,5 M4 M4×0,5 M5 M6 Torx head size (T) T8 T9 T15 T15 T9 T20 T25 Strength Class 10,9 12,9 1,31 2,3 2,95 5,2 2 8,6 10* 15 Fig. System 1 ECO PRO 2 UM Profile support plate 2 UM Profile support plate 3 Soft-cut 4 Safe-fix Item no. 179137 179165 179130 179171 179932 Fig. 1 Fig. 2 Fig. 3 Fig. 4 Thread Torx plus (M) M4,5 M5 M6 M6 M6 (T) T15 IP T20 IP T25 IP T20 IP T30 IP Screws marked with * are used in tools with this Safe-fix wedge. Strength Class 10,9 12,9 7,6 8,0 9,5 9,5 15* 09.18, B 40-08-04-50, v01 – Ref.: G.01.08.010 EN
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