Lubricate threads with a lubricant giving friction coefficient between 0.08 to
0.14. To prevent galling when using stainless steel fasteners, lubricant
containing MoS2 is recommended.
Stainless steel fasteners tend to gall while being tightened. The risk of galling or
thread seizing can be reduced by:
• Using recommended lubrication.
• Tighten the screws in the sequence indicated in the figure below.
• Tighten fasteners with low rpm’s; without interruptions.
• Apply only light pressure, see Table 22: Screw torque on page 81.
Figure 48: Tightening sequence for M4 screws
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