Threadlocker Stick - Loctite Blue Stick (9 g. Stick) Medium Strength Loctite - 506166

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Loctite Blue Stick 9 g, part number 506166, is a medium-strength threadlocker from Loctite, a Henkel brand with German origins. This easy-to-use stick applies precisely to threaded fasteners to create a secure, removable bond that resists vibration and loosening. The compact 9 g format is ideal for spot applications on small bolts, fittings, and set screws, delivering reliable retention without drips or mess. Suitable for both OEM maintenance and aftermarket repairs, this medium-strength formula remains removable with hand tools for service. Replacement is advised when bolts begin to loosen after vibration, thermal cycling, or repeated disassembly. For best results, clean the threads and apply sparingly to avoid squeeze-out, then torque to specification. Show more