I work for a company which has a very lucrative MOD contract for nuts and bolts.
So, we buy the nuts and bolts from Taiwan for, say, £10 a thousand. We repackage them into little bag of 100, label them appropriately and put loads of MOD part numbers all over it, and sell them to the MOD for probably £15 per packet.
I have made those numbers up but the mark up they indicate is realistic.
I have also found out that when those packets of 100 screws are used by technicians etc in teh army, they use say 20 screws and throw the rest away. next time they need the same screw they go and get a new packet.
The waste and inefficiency is appalling.