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ASVAB · Fasteners and Hardware

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

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 There is no difference
  2. B 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
  3. C Nails are always larger
  4. D Screws cannot hold wood

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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