Loctite screwlock nutlock studlock threadlock and retainer adhesives loctite 222 loctite 222 is a low strength thread locker that still permits screws to be adjusted it is ideal for use on low strength metals like aluminium and brass which could fracture during disassembly loctite 222 works on all metals including passive substrates such as stainless steel aluminium and plated surfaces it is proven to be tolerant of minor contamination due to industrial oils eg engine oils corro