Screw selection
27
The simplified design can be achieved with the following options
1) The required screw diameter is determined using the bolts preselection table certainly
2) A more precise preliminary design is possible in three steps:
① Calculation of the bolts total force
② Calculation of the required voltage cross section
③ Selection of thread diameter and number of bolts based on the stress area of metric threads

Fig. 1
screw connection
d thread diameter le screw-in length for steel lk grip length