Type of screw | 0.2 % yield point Rp 0.2 [N/mm2] | Tensile strength Rm [N/mm2] | Material |
Stainless steel, A2-70 | 450 | 700 | Stainless steel, 1.4301, 1.4303, 1.4307 |
Stainless steel, A4-80 | 600 | 800 | Stainless steel, 1.4401 |
Steel, strength class 8.8 | 640 | 800 | Carbon steel, quenched and tempered |
Screw | Nut | µtotal without lubrication | µtotal with MoS2 paste | µtotal greased |
A2 or A4 | A2 or A4 | 0.23 – 0.50 | 0.10 – 0.20 | - |
Steel, electrolytically galvanized | Steel, electrolytically galvanized | 0.12 – 0.20 | - | 0.10 – 0.18 |
Type of scew | 0.2% yield point Rp 0.2 [N/mm2] at | ||||
20 °C | 100 °C | 200 °C | 300 °C | 400 °C | |
Stainless steel, A2-70 | 450 | 380 | 360 | 335 | 315 |
Stainless steel, A4-80 | 600 | 510 | 480 | 450 | 420 |
Steel, strength class 8.8 | 640 | 590 | 540 | 480 | - |
Dimension and strength class | Max. tightening torque [Nm] for µtotal = | Max. preload force [kN] for µtotal = | ||||||||
0.10 | 0.14 | 0.20 | 0.30 | 0.40 | 0.10 | 0.14 | 0.20 | 0.30 | 0.40 | |
M4, A2-70 M4, A4-80 | 1.7 2.3 | 2.2 2.9 | 2.6 3.5 | 3.0 4.1 | 3.3 4.4 | 2.97 3.96 | 2.73 3.64 | 2.40 3.20 | 1.94 2.59 | 1.60 2.13 |
M5, A2-70 M5, A4-80 | 3.4 4.6 | 4.2 5.6 | 5.1 6.9 | 6.1 8.0 | 6.6 8.8 | 4.85 6.47 | 4.47 5.96 | 3.93 5.24 | 3.19 4.25 | 2.62 3.50 |
M6, A2-70 M6, A4-80 | 5.9 8.0 | 7.4 9.9 | 8.8 11.8 | 10.4 13.9 | 11.3 15.0 | 6.85 9.13 | 6.31 8.41 | 5.54 7.39 | 4.49 5.98 | 3.70 4.93 |
M8, A2-70 M8, A4-80 | 14.5 19.3 | 17.8 23.8 | 21.5 28.7 | 25.5 33.9 | 27.6 36.8 | 12.6 16.7 | 11.6 15.4 | 10.2 13.6 | 8.25 11.0 | 6.80 9.10 |
M10, A2-70 M10, A4-80 | 30.0 39.4 | 36.0 47.8 | 44.0 58.0 | 51.0 69.0 | 56.0 75.0 | 20.0 26.5 | 18.4 24.8 | 16.2 21.7 | 13.1 17.5 | 10.80 14.4 |
M12, A2-70 M12, A4-80 | 50 67 | 62 82 | 74 100 | 88 117 | 96 128 | 29.1 38.8 | 26.9 35.9 | 23.7 31.5 | 19.2 25.6 | 15.8 21.1 |
M16, A2-70 M16, A4-80 | 121 161 | 150 198 | 183 245 | 218 291 | 237 316 | 55.0 73.3 | 50.9 67.9 | 44.9 59.8 | 36.4 48.6 | 30.0 40.0 |
Dimension and strength class | Max. tightening torque [Nm] for µtotal = | Max. preload force [kN] for µtotal = | ||||
0.10 | 0.12 | 0.14 | 0.10 | 0.12 | 0.14 | |
M4, 8.8 | 2.6 | 3.0 | 3.3 | 4.5 | 4.4 | 4.3 |
M4, 8.8 | 2.6 | 3.0 | 3.3 | 4.5 | 4.4 | 4.3 |
M5, 8.8 | 5.2 | 5.9 | 6.5 | 7.4 | 7.2 | 7.0 |
M6, 8.8 | 9.0 | 10.1 | 11.3 | 10.4 | 10.2 | 9.9 |
M8, 8.8 | 21.6 | 24.6 | 27.3 | 19.1 | 18.8 | 18.1 |
M10, 8.8 | 43 | 48 | 54 | 30.3 | 29.6 | 28.8 |
M12, 8.8 | 73 | 84 | 93 | 44.1 | 43.0 | 41.9 |
M16, 8.8 | 180 | 206 | 230 | 82.9 | 80.9 | 78.8 |