In the image, the engineering structure is depicted on the left and Item structure on the right. Inside are 4 instances of fastener PN999.

The fasteners are to be purchased in a kit that contains 2 fasteners.

I want to create a kit that would be assigned a part number and that kit contains 2 instances (qty 2) of the fastener.

There are 4 fasteners to consume so I would need to order 2 of that kit.

My question is; what method do I use so that the first instance of the kit implements the first 2 fastener instances and the second instance of the kit implements the next 2 fasteners.

There should only be one reference of the kit in the database.