Q:

What is the difference between a screw and bolt?

A:

Quick Answer

A screw is a fastener that has a ridge or thread encircling the entire length of the device, while a bolt has a smooth shaft and a threaded end. Screws have heads with a depression indicating the type of driver necessary for fastening. Bolt heads are manipulated with a wrench and often have hexagonal designs.

Know More
What is the difference between a screw and bolt?
Credit: Ryouchin Digital Vision Getty Images

Full Answer

Screws and bolts are fasteners used for various types of construction and repair. They have different heads and body designs that make each of them uniquely appropriate for certain projects. The specification allows for ease of assembly and greater durability of final products.

A screw is an externally threaded post that bears ridges all the way down the length of the shaft. This threading helps dig into the surface of the pieces being screwed together, making it difficult to pull the materials apart and providing greater support in solid objects. Screws are perfect for drywall and wood.

A bolt is a smooth length of metal with a substantial head and a threaded tip. It is paired with a nut on the end that is fastened to the threading and provides reinforcement while also permitting materials to expand and contract without creating as much friction. Bolts are ideal for metal structures.


Is this answer helpful?

Similar Questions

  • Q:

    How does a screw work?

    A:

    Rotating a screw advances a spiraled incline into a surface. The head of a screw functions as a lever, while its threading is just a long incline that has been wrapped around a vertical shaft.

    Full Answer >
    Filed Under:
  • Q:

    What size drill bit is used for a #8 screw?

    A:

    When drilling a pilot hole for a #8 standard wood screw in hardwoods, one should use an 11/64-inch tapered drill bit. A 5/32-inch bit should be used for drilling into softwoods.

    Full Answer >
    Filed Under:
  • Q:

    What is zero error on a micrometer screw gauge?

    A:

    The zero error of a micrometer screw gauge occurs when the flat end of the screw touches the stud or anvil, and the gauge reads other than zero. If there is an error, it results in a positive or negative calculation. However, well-calibrated micrometers that are in good condition measure close to zero; and, they do not introduce a noticeable error.

    Full Answer >
    Filed Under:
  • Q:

    How does someone turn a bolt in order to loosen it?

    A:

    In order to loosen a bolt, turn it in a counter-clockwise direction. Turning a screw or bolt in a counter-clockwise direction to loosen it requires turning it to the left.

    Full Answer >
    Filed Under:

Explore