The most versatile threadlocker grade - removable with standard hand tools and suited for nuts and bolts 1/4 in. to 3/4 in. The maintenance shop standard around the world.
Permatex 242 (PTX-24250) is the most versatile threadlocker grade in the maintenance world. As an anaerobic adhesive, it cures when confined between metal surfaces with air excluded - reliably preventing vibration loosening while still allowing fasteners to be serviced later with standard hand tools. Suitable for nuts and bolts 1/4 in. to 3/4 in., it's the everyday workhorse for automotive, industrial, construction, and agricultural maintenance shops worldwide.
Suitable for nuts and bolts 1/4 in. to 3/4 in. - the most widely used medium-strength threadlocker in maintenance shops worldwide.
Locks against vibration but still releases with standard tools when servicing - the perfect strength balance for routine maintenance.
Cures with metal contact and air exclusion. Fills the entire thread engagement uniformly - more reliable than spring washers.
Apply, assemble, and torque - the adhesive cures on its own. No heat, no special tools, no extra workflow steps.
Backed by Permatex - the iconic American chemical brand since 1909 - and trusted by mechanics worldwide.
Make sure the bolt and nut threads are free of oil and contamination. Degrease with cleaner if needed.
Shake the bottle and apply several drops to the bolt threads. For through-holes, apply to the female threads as well.
Assemble normally and torque to specification. Curing begins immediately as air is excluded.
Full strength is reached at room temperature in approximately 24 hours. Avoid heavy loading until cured.
Source: Permatex official Technical Data Sheet (242 Medium Strength Threadlocker BLUE)
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