This is a 1x2x6 gridfinity bin that holds 3 BNC female connectors. All the matching holes are threaded with the specific BNC pitch. Threading means you will only be able to use this box for this connector only.
The bin is tall enough to allow the common adapters to fit and allow stacking with other gridfinity boxes.
The threads are fine, print those layers in 0.1-0.2mm. Use variable layer height to speed up the rest of the print.
If you're not familiar with gridfinity, I suggest you check out the author's video, the relevant tag on Printables and its sub. It's a very flexible storage system with thousands of ready made designs for everything you might have around the shop or shack.
The author marked this model as their own original creation.