DIY Guitar Strap Lock Repair: The String Method

Updated at: 09/05/2025

Guitar strap locks are essential for keeping your prized instrument secure, but even the best can fail. A broken strap lock mid-performance is a guitarist's worst nightmare, leaving you scrambling to improvise and potentially causing damage to your guitar. Fortunately, there's a quick and surprisingly effective DIY solution that doesn't require specialized tools or expensive replacements: a simple string-based repair. This method leverages readily available materials to create a reliable temporary fix, getting you back on stage or into the practice room in minutes.

This clever technique uses guitar strings themselves to create a secure and surprisingly robust locking mechanism. While not a permanent solution, it’s perfect for emergencies or when you need a temporary fix until you can source replacements. Ready to learn how to keep your guitar safely strapped on, even with broken locks? Let's dive into the step-by-step instructions.

Preparation and Safety Guidelines

Tools Needed
  • Needle-nose pliers
  • Dental floss (or strong string)
Safety Guidelines
  • Always use the correct gauge of string for your guitar; using an incorrectly sized string could damage your instrument.
  • Work slowly and carefully to avoid damaging the guitar body or the strap button. Take your time, especially when tightening the knot.
  • If you are uncomfortable working with small parts or tools, or unsure of your ability, seek professional help to avoid further damage to your guitar.

Step-by-Step Instructions

  1. Prepare the Floss and Access the Plunger

    • Create a small loop in the dental floss, ideally with a granny knot to prevent it from slipping.
    • Carefully thread the floss loop around the metal plunger inside the strap lock. A toothpick can help guide the floss.

  2. Remove the Plunger and Strap Lock

    • Gently pull on the floss to extract the plunger. Simultaneously, use needle-nose pliers to grasp the plunger as it emerges.
    • Once the plunger is out, remove the strap lock from the guitar.
    Detach the strap lock: Once the plunger is out, remove the strap lock from the guitar.Detach the strap lock: Once the plunger is out, remove the strap lock from the guitar.
    Remove the Plunger and Strap Lock

  3. Reattach the Ball End

    • Screw the ball end back onto the central piece of the strap lock.
    Reattach the ball end: Screw the ball end back onto the central piece of the strap lock.
    Reattach the Ball End

  4. Reassemble and Secure

    • Insert the plunger back into the strap lock, ensuring it's correctly aligned. Then reattach the strap lock to the guitar.
    • Use pliers to firmly tighten the ball end to prevent future detachment. Consider using a small amount of Loctite threadlocker for extra security (though the video presenter doesn't find it necessary).
    Tighten (optional): Use pliers to firmly tighten the ball end to prevent future detachment. Consider using a small amount of Loctite threadlocker for extra security (though the video presenter doesn't find it necessary).
    Reassemble and Secure

Read more: DIY Custom Ombre Guitar Strap: A Tie-Dye Tutorial (With Troubleshooting!)

Tips

  • Patience is key: This repair may require several attempts to successfully remove and reattach the plunger.
  • Use a toothpick: A toothpick is helpful for guiding the floss around the plunger.
  • Proper grip: Ensure the floss loop is firmly around the plunger and not just stuck on it.
  • Consider Loctite: While optional, threadlocker can provide added security to the ball end.

Common Mistakes to Avoid

1. Using the Wrong String Gauge

Reason: Too thin a string can break easily under tension, while too thick a string might not fit properly or damage the lock.
Solution: Select a string gauge that's close to the original thickness used in the strap lock.

2. Insufficient Knot Tightness

Reason: A loose knot will lead to the strap slipping or the string breaking, rendering the repair ineffective.
Solution: Securely tighten the knot multiple times, ensuring it's snug and won't easily come undone.

FAQs

How long will this string repair last?
This is a temporary fix, ideal for getting you through a gig or practice session. It's not designed for long-term use and should be replaced with proper strap locks as soon as possible. Expect it to hold for several hours of playing, but avoid heavy movement or excessive strain.
What type of string should I use for this repair?
Use a spare guitar string from your existing set, ideally one of a similar gauge to the others. A thicker string offers greater strength, but be mindful of potential bulkiness that might interfere with your strap button.
Frustrating strap lock failures can ruin a gig, but a quick fix is often within reach. This guide shows you a simple, effective string-based repair. Of course, the best way to prevent strap slippage is to have reliable locks on a fantastic strap. If you're looking to upgrade your strap game, check out our recent article showcasing some amazing blue guitar straps – a perfect accessory to keep secure with this handy repair method!