Loctite 209728 Heavy Duty Threadlocker, 0.2 oz, Blue Fl. Part Number: 209728. Loctite Threadlocker Blue 242 is designed to lock and seal threaded fasteners and prevent loosening from vibration. 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.
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