When an N connector isn’t

Gauge set to about 10.7 mm to show the bulkhead N female connectors clearance for a mating connector is close, but not quite long enough to ensure a full mate of the inner connector mechanics.

You would think the world of RF connectors of the pedigree of the “N” would rigorously follow the dictates of the standards that define them. Thankfully most do, but exceptions arise and here is one such example of why it pays to “trust, but verify.”