Bezeichnung Description / Dénomination
Mjfcifss!
1
Blatt/Page/Feuille: bestehend aus consisting of composé
Preloads and tightening torques for screws with metric coarse and fine threads according to DIN 13, sheet 12
6
Blatt Pages Feuille
WN 4037 I
The preload forces and tightening torques compiled in the table are based on the VDI 2230, July 1986. Assembly preloads FM and tightening torques MA for headless screws with metric coarse or fine threads according to DIN ISO 262 and DIN ISO 965 T2 (replaces DIN 13, part 13) and head dimensions of hexagon head bolts according to DIN EN 24014 (replaces DIN 931, part 1) or hexagon socket head cap screws according to DIN EN ISO 4762 (replaces DIN 912)
Metric coarse thread Surface finish: black-chrome finished or phosphatised oiled electro-galvanized flZn according to LH standard 10021432 dry Tightening Thread Class Assembly preload torque FM in N MA in Nm for mean friction factor
M4
M5
M6
M7
M8
8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9
4 050 6 000 7 000 6 600 9 700 11 400 9 400 13 700 16 100 13 700 20 100 23 500 17 200 25 000 29 500
Metric fine thread Surface finish: black-chrome finished or phosphatised oiled electro-galvanized flZn according to LH standard 10021432 dry Tightening Thread Class Assembly preload torque FM in N MA in Nm
µG= 0.12
2.8 4.1 4.8 5.5 8.1 9.5 9.5 14.0 16.5 15.5 23.0 27 23 34 40
for mean friction factor
M8x1
M9x1
M10
8.8 10.9 12.9
27 500 40 000 47 000
46 68 79
M10x1
M10x1.25
M12
8.8 10.9 12.9
40 000 59 000 69 000
79 117 135
M12x1.25
M12x1.5
M14
M16
09/2004
8.8 10.9 12.9 8.8 10.9 12.9
55 000 80 000 94 000 75 000 111 000 130 000
125 185 215 195 280 330
M14x1.5
M16x1.5
8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9 8.8 10.9 12.9
18 800 27 500 32 500 24 800 36 500 42 500 31 500 46 500 54 000 29 500 43 000 51 000 45 000 66 000 77 000 42 500 62 000 73 000 61 000 89 000 104 000 82 000 121 000 141 000
µG= 0.12
24.5 36 43 36 53 62 52 76 89 49 72 84 87 125 150 83 122 145 135 200 235 205 300 360
1.20.1