Ironmongery

he's joking of course....No ???

Go and buy a small working company and build up

or if you cant afford this go to work

get a job at a place that makes the above and

go go go

He may not be joking. He may live in a country that does not make these things and has to import them very expensively. He may be a savvy businesman who knows all about trade, but not much about manufacturing.

Will the original poster please tell us more? Where are you located, what is your background, how simple or complex is the information you require?

Basically, as a start, and assuming you do not already know these things, I will enumerate the products you mentioned and attempt to describe, in most simple terms, the processes required.

1. Nails are most commonly made from steel wire using what is called a "cold-heading" or "cold-forming" machine which uses high-speed, high-pressure tooling, called "dies", to form the metal into the required shape. While the metal may get warm from the working, it is still a "cold" process, as compared to heating metal for forging, a process also done with dies, but with less pressure.
2. Screws and bolts of a simple design are made on similar cold heading machines and using similar materials, but usually with more "hits" than the typical nail. More complex or larger screws and bolts may be produced on a high production turning machine (like a lathe) known as a "screw machine". Many other turned parts can be made on screw machines as well, although this process is not as fast or cheap as cold-heading. Screw machines actually cut chips from the metal, with resulting scrap, while cold-forming machines do not.
3. Washers, assuming you mean the small, flat, metal discs with a hole in the center, are usually produced from sheet or flat coil stock metals (steel, aluminum, stainless steel, copper, brass, etc.) on stamping presses, also known as punch presses which slam together two sets of tooling called punches and dies. The punch is usually the "male" tool, and the washer is sheared from the base stock as the punch pushes through it into the "female" die. A punch also shears the center from the washer by pushing it through another die. Simple, "one hit" tooling can shear the inside and the outside in one hit.
4. Bolts are usually made the same way as screws, see above.
5. Nuts are also made by cold-forming, including thread-forming taps, or by general purpose screw-machines and specially made nut-making machines, that work the same way. Hex nuts can be made from hexagonal bar stock, saving a step in the process.
6. Locks are complex assemblies and there are many different kinds, depending on the application. Usually made from various metal parts, formed in many different ways, including castings and forgings, as well as stampings and turned parts described above. Assembly techniques can include using fasteners, like screws and nuts, cold-forming such as riveting or swaging, adhesives, etc. Assembly can be done by hand, semi-automatic machines, automatic robots, or high-speed assembly machines.
7. Keys, if you mean a key to fit a lock, are usually made of brass or aluminum, metals that cut easily. The blank key is usally made as a stamping, like a complex washer, then a pattern is cut into each blank to fit a particular combination of mechanisms inside the lock.
8. Handles and Levers are fairly broad terms to describe many different kinds of parts, most of which are designed for the human hand to assist some kind of mechanical actuation, usually a door or other mechanism, as on a house, or a car, or a cabinet, or a machine. They can be made from plastic, metal, or even ceramic or glass. They can be one simple part or a complex assembly.

Now, if you provide more specific information, you may get a more specific answer.

Interesting enough, the old time blacksmith when work was slow and he did not have work the moment would take some of his scrap and form it into nails. If you look at the old Anvils they all had a hole to mount a nail making form. The metal was heated and then driven into a hole that would shapr it and the it was cut and driven out. It was quite a process that took up a lot of time and labor, but used up their scrap and furnished a needed comodity and cash.

Thanks for the history lesson, but I don't think our poster is interested in how things used to be done. It would be hard for him to start up a nail manufacturing business and compete with imported goods by setting up a smithy and hand hammering square nails!

I do not mean to be argumentative, but we do not have enough information to tell just what the focus of his intended market is. There are many small but very successful niche businesses that do just this kind of fabrication and smithy work. It is a growing and essential industry if one is involved in any kind of historic restoration.