Have you ever struggled to remove a screw and wondered whether to turn it clockwise or counterclockwise? Knowing the correct direction is essential to avoid damaging the screw or the surface it is attached to.
This guide will explain the right way to unscrew a screw, the “righty-tighty, lefty-loosey” rule, exceptions to this rule, and tips for removing stubborn screws.
Clockwise or Counterclockwise: Which Way to Unscrew?
Understanding the “Righty-Tighty, Lefty-Loosey” Rule
A general rule for screws is:
- Turn clockwise (right) to tighten.
- Turn counterclockwise (left) to loosen.
This rule applies to most standard screws and bolts. When you need to unscrew something, you should turn it counterclockwise (to the left).
How to Determine the Correct Direction
If you are unsure which way to turn, follow these steps:
- Place your screwdriver or wrench on the screw.
- Imagine a clock face.
- Turning right (clockwise) will tighten the screw.
- Turning left (counterclockwise) will loosen the screw.
Exceptions to the Rule
Although the “righty-tighty, lefty-loosey” rule applies to most screws, there are exceptions.
1. Left-Handed (Reverse Thread) Screws
Some screws have left-handed threads, meaning they tighten counterclockwise and loosen clockwise. These are found in:
- Ceiling fans (some fan blades use reverse-thread screws).
- Bicycle pedals (left pedal screws are often reverse-threaded).
- Gas fittings (to prevent accidental loosening).
- Some automotive parts (such as certain lug nuts and engine components).
If a screw doesn’t loosen counterclockwise, check if it has a reverse thread before applying extra force.
2. Stripped Screws
A stripped screw is one where the head is worn down, making it difficult to turn. If you turn counterclockwise and the screw doesn’t move, try using:
- A rubber band for extra grip.
- A pliers or locking wrench to twist it out.
- A screw extractor tool for heavily stripped screws.
3. Rusted or Stuck Screws
If a screw is rusted or stuck:
- Apply penetrating oil (such as WD-40) and wait a few minutes.
- Use a hammer and screwdriver to gently tap the screw head and break rust bonds.
- Apply steady counterclockwise pressure to avoid breaking the screw.
Best Tools for Unscrewing Screws
1. Screwdrivers
- Flathead Screwdriver (for single-groove screws).
- Phillips Screwdriver (for crosshead screws).
- Torx Screwdriver (for star-shaped screws).
2. Power Tools
- Cordless Drill (for faster unscrewing).
- Impact Driver (for tight or rusted screws).
3. Pliers and Wrenches
- Locking Pliers (Vise-Grip) (for stripped screws).
- Adjustable Wrench (for bolt-style screws).
How to Prevent Screws from Getting Stuck
- Avoid over-tightening screws, as this can damage the threads.
- Use lubrication (like grease or oil) for screws exposed to moisture.
- Store screws in a dry place to prevent rust.
To unscrew a screw, turn it counterclockwise (left) following the righty-tighty, lefty-loosey rule. However, reverse-thread screws exist in some applications, so always check before applying force. Using the right tools and techniques will help you remove screws efficiently and prevent damage.
By following this guide, you’ll never have to second-guess which way to turn a screw again!