This range of snap action switches is now available from Hertford Controls with strengthened mounting holes. Hollow brass inserts reinforce the mounting holes, preventing over-tightening of the switches during assembly.
This is a Hertford Controls initiative in response to customer feedback and is a far cheaper solution than specialised shoulder bolts.

It is important to note that the strengthened versions reduce the fixing bolt size from M4 to M3.

Please see download for further information.