On the toilet and the back seat of a car...
Hope this helps.............
A fair amount of steel (iron with a little bit of carbon), used in frames for beds and stools, screws, radiators, washing machines, computers etc. Copper is used for wiring and piping, lead used to be used but now is being phased out. Lead is used for flashing, on roofs around brickwork. Aluminium is sometimes used in windowframes, pans etc. Zinc is used to gavalnise steel screws and steel fencing. Brass door knobs are sometimes used and brass screws for decorative purposes (brass is a zinc and copper alloy).
There are many places you can purchase lead screws. Any place that specializes in nuts and bolts, engine repair or home improvement would likely carry these items.
There are many retailers both in store and online where one can purchase some lead screws. They can be purchased from 'Amazon', 'Walmart', 'Home Depot' and 'Haydon Kerk'.
All screws are used as simple machines.
A screwdriver is used to turn screws in or out.
Lead screws (always pronounced "LEED," as in the present tense of the verb "to lead") are used in mechanical transmission systems to convert rotary motion to controlled linear motion. A common example is in the machinist's screw-cutting lathe. Here a motor turns the lathe's headstock to rotate the piece being machined. A train of gears connected to the headstock turns the lead screw which is usually as long as the entire lathe. As the lead screw turns it propels the cutting tool along the workpiece at a rate directly linked to the rotation of the headstock.
Divide the threaded length by the lead length. For single threaded screws the lead is the same as the pitch.
Screws are used to hold certain things together.
Metals are used for the production of screws as they are materials with high hardness and resistance to stress.
Screws were not used to build the wall. They weren’t invented yet.
They are used to loosen and tighten screws