Loctite Threadlocker Blue 242 - Removable Thread Lock Glue for Nuts, Bolts, & Fasteners, Medium Strength Screw Glue to Prevent Loosening & Corrosion - 6 ml, 1 Pack
Condition: New
$7.87
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Extended holiday returns
FREE refund/replacement until Jan 31, 2027 Learn more
FREE refund/replacement until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
In Stock.
Arrives
Tuesday, Nov 17
At a glance
- Condition
- New
- Style
- Blue (Removable)
- Size
- 1 Pack
- Total product quantity
- 0.2 Fl Oz
- Weight
- 5 g
- Color
- Blue
- Material
- Dimethylacrylate ester
- In the box
- Loctite Heavy Duty Threadlocker0.2 ozBlue 242Single
- Warranty
- Warranty
Features 5
- Lock and Seal Fasteners: Prevents loosening of metal fasteners caused by vibration on small motors, mowers, and power equipment
- Prevents Rust and Corrosion: Protects from leaks, rusting, and corrosion and eliminates need to stock up on expensive lock nuts and washers
- Removable: Can be removed with hand tools
- Easy and Quick: Sets in 10 minutes and fully cures in 24 hours
- For 6-19mm Fasteners: Medium-strength formula for use on threads for 6mm to 19mm nuts and bolts
Description
Loctite Threadlocker Blue 242 is designed to lock and seal threaded fasteners and prevent loosening from vibration. Ideal for 6-19mm fasteners, this unique formula is great for small motors, mowers, and power equipment. Loctite Threadlocker Blue 242 protects threads and prevents from leaks, rusting, and corrosion and eliminates the need to stock up on expensive lock nuts and washers. Fast and easy to use, this medium-strength threadlocker sets in just 10 minutes and fully cures in 24 hours. Loctite Threadlocker Blue 242 is particularly suited for applications on less active substrates such as stainless steel and plated surfaces, where disassembly is required for servicing. From the Manufacturer Loctite Threadlocker Blue 242 locks threaded metal fasteners against loosening from machine vibration. It prevents leaks and rusting of metal threads for 1/4- to 3/4-Inch (6 mm to 20 mm) nuts and bolts. Metal parts can be removed with hand tools for easy disassembly if necessary. Sets in 20 minutes and cures in 24 hours. Especially useful for small motors, mowers and many types of power equipment.
Specs 26
| Brand | Loctite |
|---|---|
| Specific Uses For Product | Threadlocker |
| Material | Dimethylacrylate ester |
| Item Form | Liquid |
| Special Feature | Strong |
| Other Special Features of the Product | Strong |
| Container Type | Tube |
| Viscosity Level | Medium |
| Full Cure Time | 24 hours |
| Water Resistance Level | Water Resistant |
| Tensile Strength | 110 pounds per inch |
| Compatible Material | Metal |
| Item Package Quantity | 1 |
| Volume | 6 ml |
| Material Type | Dimethylacrylate ester |
| Color | Blue |
| Brand Name | Loctite |
| Model | Henkel / osi -tanch-it- |
| UPC | 079340242005 |
| Number of Pieces | 1 |
| Number of Packs | 1 |
| Global Trade Identification Number | 05 |
| Manufacturer | Henkel Corporation |
| Item Type Name | Blue 242 |
| Item Weight | 5 g |
| Part Number | 209728 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 17
Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
An essential threadlocker for gunsmithing
Size: 1 Pack
Style: Blue (Removable)
I’ve used Loctite Blue 242 in my home workshop for about two years now, mainly for gunsmithing projects, mounting rifle scopes, and securing accessory rails. If you work on firearms or outdoor gear subject to constant vibration, keeping screws locked in place without permanent welding is critical, and this product does the job reliably. Pros: Reliable Hold Against Recoil: Effectively locks sight screws, scope rings, and Picatinny rail mounts in place so they don't back out or vibrate loose after extended range sessions. Removable with Hand Tools: Secures fasteners tightly while still letting you break the seal and remove screws with standard hand tools without stripping heads or needing high heat. Protects Against Corrosion: Seals threads from moisture, oil, and sweat, preventing rust or seizing over long periods. Controlled Precision Applicator: The nozzle makes it easy to place a tiny single drop directly onto fine 6-32 or 8-40 gunsmithing screw threads without making a mess. Cons: Cure Time Requires Patience: Needs about 10–20 minutes to set and a full 24 hours to cure completely, so you need to let your setup sit overnight before taking it to the range. Whenever I mount a new optic or tighten down handguard screws, applying a small dab of Blue 242 to the clean threads gives complete peace of mind. It cures reliably when there's no air between metal threads, holding zero on scopes even after hundreds of rounds of heavy recoil. When it's time to swap optics or clean parts, the screws back out cleanly with firm pressure from a driver bit. If you do any level of gunsmithing, DIY firearm maintenance, or heavy-duty gear assembly, a bottle of Loctite Blue 242 is an absolute necessity on your workbench!
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Reviewed in the United States on October 4, 2026 by Christopher D Pleasant
Loctite Blue 242 Medium Strength Threadlocker Perfect for Equipment Maintenance 🔧
Size: 1 Pack
Style: Blue (Removable)
This 6ml Loctite Blue 242 threadlocker is my trusted pick for lawn equipment and bike bolt maintenance. This medium-strength formula stops fasteners from backing out under constant vibration and guards threads against rust and corrosion. Unlike high-strength red threadlocker, it still lets you take bolts apart later using regular wrenches for future servicing. I only apply a tiny drop on clean threads, and it cures nicely without messy overflow. The compact tube fits easily inside my tool pouch, and it won’t dry out quickly between uses. It works reliably on steel, stainless steel and plated bolts. Whether repairing ATVs, bicycles or garden machinery, this threadlocker delivers consistent performance. It’s a must-have for anyone doing DIY mechanical repairs. I will keep buying this whenever I run low
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Reviewed in the United States on September 28, 2026 by terrell
handy threadlocker for keeping my trail gear bolts snug
Size: 1 Pack
Style: Blue (Removable)
I bought this to keep the bolts on my hitch bike rack from working loose on the drive to weekend trailheads. The little 6 ml tube takes up hardly any room in my garage kit, and I only need a small dab on each clean thread. Last Saturday, after a washboard stretch of road, I checked the rack in the parking lot and the fasteners stayed snug. That made me glad I had used it before the trip. Blue 242 holds well but still lets me remove a bolt with hand tools when I need to adjust the rack. A tidy, practical tube for small fixes between hikes.
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Reviewed in the United States on October 7, 2026 by Dreama Hildebrand
A handy fix for the chair bolts in my dorm room
Size: 1 Pack
Style: Blue (Removable)
I bought this for my dorm because one bolt on my desk chair kept backing out after I moved in. I cleaned the threads, put a small drop of Loctite on the bolt, and tightened it again. The chair stopped wobbling during late-night study sessions, which made me glad I had it. The 6 ml bottle is small enough to keep in my desk drawer, and I only needed a little. I like that Blue 242 holds the fastener but still lets me remove it later with tools, since dorm furniture may need adjusting when I move out. It was simple to apply and did the job on that loose chair bolt.
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Reviewed in the United States on October 6, 2026 by amy
handy fix for a loose cart bolt
Size: 1 Pack
Style: Blue (Removable)
I bought this online after one bolt on our rolling laundry cart kept backing out whenever I moved a basket. As a stay-at-home mom, I’m constantly hauling laundry around, and the wobble was getting annoying. I cleaned the threads, added a little Blue 242, and tightened it. After letting it cure, the bolt stayed put through several trips across the hallway, which is what I needed. I like that I can still remove it later with hand tools if I need to take the cart apart. The 6 ml bottle is quite small, though, and the cap took me a minute to figure out. Still, a little goes a long way for small household fixes 🙂.
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Reviewed in the United States on October 11, 2026 by Penny
Loctite Blue 242 Medium Strength Threadlocker Great for Motorcycle Maintenance 🔩
Size: 1 Pack
Style: Blue (Removable)
This 6ml single tube of Loctite Threadlocker Blue 242 is my go-to for motorcycle rebuilds and regular bolt maintenance. The medium-strength formula locks nuts and bolts firmly against constant road vibration while still allowing disassembly with standard hand tools later. It seals threads to block moisture and slow corrosion, which matters a lot for bikes exposed to rain and road grime. I only need a tiny drop on clean threads, and it cures reliably without messy overflow. The compact tube tucks neatly inside my motorcycle tool roll, easy to bring on rides. It works perfectly on brake, frame and engine fasteners. This classic Loctite threadlocker prevents annoying loose bolts and saves roadside headaches. I always keep one spare tube handy and will reorder once empty.
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Reviewed in the United States on September 28, 2026 by Kai Mason
## Stops Vibration-Loose Bolts, Still Lets You Disassemble Later! Loctite Blue 242
Size: 1 Pack
Style: Blue (Removable)
I keep this tiny 6 ml tube of Loctite Threadlocker Blue 242 in my garage toolbox for all my DIY repairs. Vibration used to shake bolts loose constantly on my lawn mower, bike and truck accessories. Medium-strength blue threadlocker is the sweet spot for me. It locks nuts and bolts firmly and prevents corrosion on metal threads. The best part is that it’s removable with standard hand tools, unlike high-strength red threadlocker that’s nearly permanent. It sets quickly and fully cures in 24 hours. A small drop goes a long way; this little tube lasts for dozens of fastener jobs. Whether I’m working on car parts, yard equipment or outdoor hardware, this threadlocker keeps bolts from creeping loose. Essential staple for every home mechanic🔩
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Reviewed in the United States on September 30, 2026 by heather diamond
Saved my bike from loose bolts! 🔧
Size: 1 Pack
Style: Blue (Removable)
I love fixing up my old mountain bike on weekends, and vibration always makes bolts creep loose over time. This Loctite Blue 242 threadlocker is exactly what I needed. It’s medium strength, so bolts stay locked during rides, yet I can still take them apart with regular tools later, no drama. Just a tiny drop is enough, the 6ml tube lasts ages. It also helps stop corrosion on metal threads. After applying it to my handlebar and pedal bolts, nothing wobbles anymore. Great for DIY repairs around the garage. Super reliable, 5 stars!
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Reviewed in the United States on September 28, 2026 by victor clemente