LOCTITE 222 Low Strength Threadlocker, Purple, 50ml, Boeing PN 21464 for Small and Fine-Thread Fastener Applications
Applying medium or high strength threadlocker to small instrument screws and fine-thread fasteners creates a removal problem at the next maintenance access that can damage the fastener head or strip the thread entirely. Supplied by JHEARs Aerospace, LOCTITE 222 is the low strength purple threadlocker formulated specifically for small fasteners that require vibration-resistant retention now and routine, tool-free or light-hand-tool removal when maintenance access is needed. The low clamping load means the fastener releases cleanly without the risk of thread damage that stronger compounds create on fine-pitch and small-diameter threads.
The purple colour distinguishes it clearly from the blue medium strength and red high strength products on the bench, so the correct grade is identifiable at a glance rather than relied upon from memory mid-task. Boeing PN 21464 approval makes this a specification-verified product for aircraft where the maintenance manual calls for threadlocker by that Boeing part number designation, providing compliance confidence rather than a generic substitution that may not satisfy the documentation requirement. In a 50ml volume, it is sized for professional workshop and line maintenance use across the range of small fastener applications that require this specific grade.
Spec: LOCTITE 222 low strength threadlocker, purple, 50ml. Boeing approved PN 21464. Suitable for fasteners up to M12 diameter, optimised for small and fine-thread fasteners below M6. Removable with light hand tools. Vibration-resistant retention. Anaerobic cure on metal threaded fasteners.
Who this is for: Aircraft mechanics and A and P technicians securing instrument cover screws, access plate fasteners, and fine-thread hardware that requires frequent maintenance access, avionics engineers working on panel fasteners and adjustment screws where thread damage from over-strength threadlocker is a real risk, and maintenance operations on Boeing aircraft where PN 21464 is specified in maintenance documentation.
FAQ
What fastener sizes is LOCTITE 222 most appropriate for?
LOCTITE 222 is designed for fasteners up to M12 in diameter and is particularly suited to small and fine-thread fasteners below M6 where the risk of thread damage from medium or high strength compounds is highest. For fasteners above M6 that will be regularly removed, LOCTITE 243 medium strength is typically the more appropriate choice. Always verify the correct threadlocker grade in your maintenance documentation.
How does the purple colour help in a professional maintenance environment?
The purple colour provides instant visual identification that distinguishes LOCTITE 222 low strength from blue medium strength LOCTITE 243 and red high strength LOCTITE 271 or 272 products. In a busy workshop where multiple threadlocker grades are in use simultaneously, colour coding prevents grade substitution errors that could result in fastener removal damage or inadequate retention depending on the direction of the mistake.
What does Boeing PN 21464 approval mean for maintenance compliance?
Boeing PN 21464 is the Boeing part number under which LOCTITE 222 is approved for use on Boeing aircraft where the maintenance manual specifies threadlocker by that part number. Using a Boeing-approved product by its correct PN satisfies the maintenance documentation requirement, whereas using a generic alternative without the PN approval may not satisfy the compliance requirement depending on the aircraft operator's maintenance programme.
Why should I purchase my approved threadlocking products from JHEARs Aerospace?
At JHEARs Aerospace, we supply Loctite threadlocking and bonding products including Boeing-approved items sourced to ensure product authenticity and specification compliance. Our range gives maintenance engineers confidence that the product received is the correct, approved material for the fastener applications their maintenance documentation requires.
