Do I really need to drill up to 17,5mm in diameter for installing the receptacle with the 4002 camloc series?

Question: The specifications in one catalog says to drill a hole with diameter of 0.688’’ (17.5 mm). The specifications in the other catalog say to drill the hole with diameter 16 mm. In the picture below, you can see holes of the receptacle and rivets. The hole diameter is about 13-13.5 mm. If the hole diameter is increased to 17.5 mm or 16mm, the holes comes very close to the rivet holes and there will be a risk of tearing the pieces between receptacle hole and rivet hole. Is there any specific reason for drilling the hole up to 17.5 mm or 16mm? Can it be drilled to more smaller diameters (14-14.5 mm)?   Answer: A diameter of 16mm is what we recommend for standard as it works even with the floating receptacle and gives enough clearance to compensate bigger tolerances that might appear with large sheet metal panels. In this case we would recommend 14mm diameter. or even 13mm diameter with a countersink might work. Again it depends on the number of ¼-turns that are used per sheet and the tolerances that appear. The outer diameter of the snap-on retaining ring is 13mm, so 12,5mm dia. will not work. We do not see any technical problem using a 14mm dia. hole, the best way might be to try it out, but I have to mention that we can not take any guarantee for this.