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ASVAB · Fasteners and Hardware

What is the main difference between a nail and a screw?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

A nail is driven straight in (usually with a hammer) and holds by friction; a screw has threads, is turned in, and grips more securely and is removable

  1. A A nail is driven straight in (usually with a hammer) and holds by friction; a screw has threads, is turned in, and grips more securely and is removable
  2. B There is no difference
  3. C Screws cannot hold wood
  4. D Nails are always larger

Why this is the answer

A NAIL is driven straight in (usually with a HAMMER) and holds by FRICTION; a SCREW has THREADS, is turned in (with a screwdriver/drill), grips more SECURELY (the threads bite into the material), and can be easily removed. ASVAB Shop Information tests fasteners. Screws provide stronger, more reliable holding power and can be unscrewed; nails are faster to install but hold less securely and are harder to remove cleanly. Knowing the nail-vs-screw distinction (friction vs threads, holding strength, removability) is commonly tested.
Source: ASVAB Shop Information — Nails vs Screws

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About this topic: Fasteners and Hardware

Fasteners and hardware questions cover screws, bolts, nuts, washers, nails, rivets and anchors, including thread types and when to use each. Expect questions on the difference between a wood screw, a machine screw and a lag bolt. This is one of 9 Shop Information questions on fasteners and hardware, each with a full explanation on a single study page.

New to this exam? Our ASVAB exam guide explains the format, scoring, and how to prepare.

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