Common Projects that Utilize Loctite Threadlockers

    March 12, 2014

Locking and sealing nuts and bolts with Loctite® Threadlockers is a popular practice among vehicle repair, but there are a wide variety of other applications that can benefit from threadlocker technology as well.  Below are just a few examples of how Loctite® Threadlockers are being used, ranging from cars and motorcycles to watches and eyeglasses.

Scroll down to view each description or simply click the links below to jump right to the threadlocker of your choosing.

  1. Low Strength: Purple Threadlocker

  2. Medium Strength: Blue Threadlocker

  3. High Strength: Red Threadlocker

  4. Wicking: Green Threadlocker

For a breakdown on all four threadlockers: The Difference Between Red, Blue, Green and Purple Threadlockers

1. Loctite® Purple Threadlocker 

Ever have the fasteners on your eyeglasses begin to loosen or need to repair your laptop computer? Loctite® 222™ is a threadlocker that specializes in these small fastener assemblies, typically under 1/4″.  The biggest benefits of this threadlocker are that it can be easily applied to small fasteners, will lock and seal out moisture, but can be gently removed with the same hand tool you used to assemble the fasteners.

Why would you want an ‘easily removable’ threadlocker?  Often times smaller fasteners are used on assemblies that are very delicate. This threadlocker gives you the option to still reliably hold your assembly together, but if you ever feel the need to remove them, it won’t take a large amount of torque that could potentially damage the overall assembly.  In fact, this threadlocker is so versatile, Kelly Matson wrote an entire post about it last year; When and Why to Use Purple Threadlocker.

2. Loctite® Blue Threadlocker 

The number one product to keep in your garage is by far Loctite® 243™ Medium Strength Threadlocker. It is higher strength than Loctite® 222™, but still can be removed using standard hand tools.

The number of times Loctite® Medium Strength Blue Removable Threadlockers have come in handy around my house is countless! Over the winter months, my front door begins to loosen up from harsh winds and everyday use. One of my common projects is to tighten everything up when this happens. Here’s how it unfolds:

  1. Lay out newspapers for easy cleanup.

  2. Remove one of the screws that connect the front and back of the knob/handle with a screwdriver.

  3. Now break out my favoirite blue threadlocker, Loctite® 243™ Medium Strength Threadlocker.  Apply one drop on the threads of the removed screw and roll the screw until the adhesive is coated around the threads.

  4. Replace the screw in its proper hole.

  5. Repeat until all your screws are securely in place once again.  

Loctite® blue threadlockers are designed to be removable, meaning the assembly can be taken apart with the same tools it was put together with. The blue threadlockers are not meant to add strength to an assembly, but to prevent a tight assembly from vibrating loose.

Want more info on blue threadlockers? Read Blue Threadlocker Basics.

3. Loctite® Red Threadlocker 

Your average lawn mower or snow blower is full of vibration, this vibration is a torqued assemblies worst nightmare. The best use of red threadlocker is for areas of heavy vibration. 

Our lawn and garden equipment generally sees a lot of abuse, especially the equipment that sees the winter months. I would recommend using a High Strength Red Threadlocker for some key areas such as the bolts that hold the motor to the deck of a snow blower or lawn mower. In these situations, specifically a product like Loctite® 271™ High Strength Threadlocker works best.  Simply apply Loctite® 271™ to the nut and bolt, reassemble, and it will not only protect the fasteners from corrosion, but lock them in place to help resist shock, vibration, and temperature variance. 

What do I do if I ever need to take these fasteners apart?  Depending on the size of the bolt, you may have to apply localized heat to soften the threadlocker in order to remove it with hand tools.  To learn how, read How to Remove Red Threadlocker.

4. Loctite® Green Threadlocker

Ever have an assembly that’s already been put together but they forgot to use threadlocker on the fasteners?  Loctite® 290™ Wicking Grade Threadlocker is specifically designed for those projects that the fasteners are already in place and torqued down, but you want to add more reliability.  Simply place the tip of the threadlocker bottle at the interface of the nut and bolt (or bolt and blind hole) and apply a few drops.  The product has the ability to wick in between the thread engagement, fully cure within 24hrs, then lock and seal for the life of your assembly…all WITHOUT having to take the fasteners apart during application.  I use this product on a number of applications, including bikes, instrumentation screws and carburetors.

All Loctite threadlockers have their particular uses.  For any questions on best practices, disassembly methods, a specific application, just comment below and I will get back to you!

Note: The threadlockers linked above are for Automotive Aftermarket Only.  For Industrial Maintenance threadlockers, click here.

 

You may also be interested in: The Difference Between Red, Blue, Green and Purple Threadlockers

About the Author, Andy Scott

Andy Scott has been with Henkel for 7 years and is currently an application engineer. He started with Henkel in 2007 as an intern while attending school. He earned a Bachelors Degree in Mechanical Engineering from Central Connecticut State University. Andy has been interested in how anything and everything mechanical works from the time he could walk. From his personal and professional projects, Andy has brought his expertise in fabricating and building cars, trucks and ATVs.

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14 responses to “Common Projects that Utilize Loctite Threadlockers”

  1. bill auberlen says:

    Dear Andy,
    I have been having a bit of an issue with a boat gear box assembly that we produce. It is a fine threaded brass ring about 3.5 inches in diameter with about 1/2 worth of thread engagement. It threads on to a piece of hardened steel. We screw them on then we actually tighten by a big hammer and punch and tighten the ring on via one indent in the side. We punch the ring very hard until it quits moving. We see them turn over time and then the internal shift timing is off. I have used the green and also the red and different primers. I guess I am asking what is the absolute strongest loctite and primer combo for this application. It would be very helpful to finally know I am using the strongest available products.

    thanks

    bill auberlen

  2. Andy Scott Andy Scott says:

    Hello Bill. First off, thank you for reading and also for using LOCTITE products. To your question, primers are generally required when working with inactive metals/materials (metals that don’t rust or corrode). In this situation, the brass and steel are going to be highly active metals, because the two metals are so active the use of a primer can actually create a weaker assembly (one of those situations where too much of a good thing is a bad thing). When a typical threadlocker (blue/red) on a clean surface are not sufficient, a retaining compound would be the next step up, a common high strength retaining compound would be Loctite 680. A retaining compound is applied to the surface in the same manner as a threadlocker, they are just typically used for holding a bearing or gear onto a shaft that doesn’t have threads to begin with.

  3. […] Loctite application guide. Source: Henkel Adhesives […]

  4. […] Loctite application guide. Source: Henkel Adhesives […]

  5. John Uhrig says:

    I have a front gun sight that keeps coming loose which loctite is the best and how do I get the screw back out if I have the need to. Thanks

    • Brandon Gearing says:

      Hi John, thanks for your question. Loctite 243 (blue) should do the trick. It’s a removable threadlocker so if you need to take apart the assembly, all you need is regular hand tools.

  6. Em says:

    Hi Andy,
    We have an old reclining chair with a broken mechanism. I’ve tried replacing the broken riveted pivot points on both sides with a bolt and lock nut but they are quickly worked off. Obviously I can’t tighten it all the way down with a regular nut so that it is still free to pivot. Do you think the red loctite would solve my problem?

    • Sara Lopes says:

      Hi Em, thank you for your question! The Red 271 Threadlocker when applied to metal to metal fasteners can prevent loosening from shock and vibration. The Red Threadlocker could be a suitable product for your situation.

  7. washington garcia says:

    My comments is actually is a question.
    I did use Red Loctite (the one comes on a like lip stick).
    I use it on a Brass fitting threaded into the intake manifold of a Mercedez Benz Sprinter 2500.
    I did the right thing?
    Red will work on brass and aluminum?
    Brass fitting is the output for the turbo gauge plastic line.
    I believe there is no more than 25psi and Temperature will not get greater than 190 degrees 210 max
    1 week into the job and nothing happen yet, just ask.

    • Sara Lopes says:

      Hi Washington, thank you for reaching out! In order to properly help your situation, I recommend calling our tech support line 1-800-562-8483 and select option #1 for Industrial Tech Support. They are the team that can best help you with your question.

  8. Shahid says:

    Can I use 270 green loctite to fasten Caliper bolt and remove it in future without applying heat

    • Sara Lopes says:

      Hi Shahid, thank you for your question. We will actually need more information in order to give you our best recommendation for your project. Please call 1-800-LOCTITE or email tech.services@henkel.com and one of our tech support team members will be more than happy to help you with your question. Thank you!

  9. Lucille says:

    hi. which product can i use on a kitchen faucet handle. I have a Moen Lindley and the darned handles keeps getting loose. I read a post to use the removable thread lock, but it doesn’t say which color. Thanks!

    • Sara Lopes says:

      Loctite Blue (242) is a good candidate for your project. It is available in retail outlets such as Home Depot and Lowe’s. If you’d like to learn more about this product or our recommendations, please contact Tech Info at (800) 562-8483. Thank you!

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