Question

One use of screw and bolt

Answer 1

Explanation:

The Machinery's Handbook explains that bolts are used to assemble to unthreaded objects, typically with the use of a nut. In comparison, screws are used to assemble objects with threads. Here's the thing, though: not all objects in which screws are used already have threads.

Answer 2

Answer:

screws are used to assemble objects with threads.