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We developed a threadlocking adhesive that not only eliminates vibrational loosening, it eliminates the damage that happens after. We suspended two identical loads 130 feet in the air vibrating at the same rate. There’s only one small difference. One machine was securely fastened with LOCTITE(r) Threadlocker 243(™) to prevent vibrational loosening. Watch what happens when a few drops of Threadlocker prove to be the difference between success and failure.
Mechanical locking devices (such as split ring washers, nylon insert nuts, and serrated tooth washers) play central roles in most industry. They were invented to solve the common problem of loosening that happens in most threaded assemblies. However, they don’t really “lock” the assemblies and can’t maintain clamp load. Tranditional locking methods only have 15% metal to metal contact, leaving a sizeable air gap in the assembly. Due to this air gap, they often loosen under vibration, thermal expansion, bending, and/or improper torque.
LOCTITE® threadlockers provide the ideal, dependable, and long-term way of ensuring threaded fasteners remain fixed and secure. Applied between two mating threads, liquid threadlocker adhesives secure nuts, bolts, and threaded fasteners in place. They cure to form a strong bond that prevents loosening, ensuring assemblies retain clamp load over time.
Lock threaded assemblies against vibrational loosening
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Fills 100% of the gap between threads of nut and bolt which eliminates the root cause of vibrational loosening.
Outperform all locking devices
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Better clamp load retention compared to all mechanical locking devices.
Increase end product service life
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Higher off-torque provides additional safety.
Prevent galling and corrosion
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Protects against corrosion by forming an impenetrable layer between nut and bolt threads. Liquid film prevents friction welding or galling between nut and bolt threads.
Permit disassembly
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Low and medium grades allow disassembly with standard hand tools.
Minimize inventory cost and complexity
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One size fits all - applicable for a wide range of fastener sizes.
Save cost
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Lower cost per unit compared to most locking devices.
Increase durability
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Thermal Resistance of up to 150 C and higher. Able to withstand most industrial gases and fluids. Field proven for decades.
Our products are available in many different grades to cater to a broad array of applications. Choosing between a LOCTITE® red, blue, green, or purple threadlocker will depend on the specific needs of your project and the threadlocker strength you require.
Check out our guide on selecting the right thermal material for your needs.
Apply a liquid threadlocker onto the bolt and proposed tightened nut engagement area. Any excess threadlocker is pushed along with the nut as it is tightened. The volume of threadlocker needed depends on the size of the fastener and engagement area. A few free-falling drops is a typical volume required for an M10 or 3/8" bolt. A minimal amount of threadlocker squeezing out from the nut and bearing surface interface indicates that a sufficient volume of product has been used to fill the clearance.