Page 688 - Mastik®

Approximate values for fasteners with Tightening torques
hexagon and hexalobular socket heads

Screws conforming to the present speci- consideration the reduced tightening torques due to the specific type of inner
fication are subject to reduced load torque. drive - special conical bits may be help-
strength in compliance with ISO 898-1, It may not always be possible to ap- ful here.
meaning that it is necessary to take into ply the maximum specified tightening
Maximum tightening torques MA max. [Nm]
Standard Bossard Bossard eco-fix ® eco-fix ® Bossard SHEETtracs ® DIN 7991 ISO 14581 Bossard DIN / ISO
c a a f f c c c a

Screw
type ISO 4026/DIN 913

ISO 4027/DIN 914
ISO 4028/DIN 915

ISO 4029/DIN 916
Steel 08.8 010.9 4.8 4.8 4.8 010.9 08.8 4.8 45 H *)
BN 20367 BN 11252 BN 5128 BN 4825 BN 380 BN 20191 BN 20 BN 4851 BN 5950 Diverse
BN 381 BN 21
BN 1422
M 2,5 0,3 0,3 0,3 0,5 0,32
M 3 1 1 0,5 0,5 0,5 1,3 0,8 0,6 0,5 0,5
M 4 2,5 2,5 1,2 1,2 1,2 3 2 1,3 1,2 1,5
M 5 5 5 2,4 2,4 2,4 6,5 3,8 2,6 2,4 3
M 6 8 8 4 4 4 11 6,6 4,5 4,1 5
M 8 20 20 16 11 10 12
M10 40 40 31 21 20 24
M12 65 65 54 36 34 40
M14 86 58 60
M16 132 90 100
M18 184 130 120
M20 260 180 180
M22 350 250 210
M24 440 310 310
INOX A2 A2 A2 A2 A2 A2 A2 / A4
BN 10649 BN 5952 BN 2845 BN 616 BN 3803 BN 5951 Diverse
BN 4719
M 2,5 0,5 0,4 0,4 0,23 0,23
M 3 0,8 0,8 0,8 0,4 0,4 0,8 0,2
M 4 1,8 1,6 1,6 0,9 0,9 1,8 0,7
M 5 3,6 3,2 3,2 1,8 1,8 3,6 1,5
M 6 6,3 6 6 3,1 3,1 6,3 2,5
M 8 7,6 7,6 15,2 6
M10 15 15 30 12
M12 25 25 51 20
M14 40 40 30
M16 63 63 50
M18 85 85 90
M20 120 120 105
M22 160 160 150
M24 200 200

* ) Property classes and mechanical properties in compliance with ISO 898 Part 5 do not apply for headless bolts subject to tension
loads.

Guideline values*) Check the
The screws are not suitable for transferring high operat-
boundary
ing forces. The inner and outer actuation of these screws
conditions!
permits only reduced tightening torques to be used.