Loctite 221 Vs. 222 | In-Depth Comparison
When screws or bolts loosen due to vibration, shock, or thermal expansion, you may consider using a threadlocker. It is a liquid or semi-solid adhesive that fills the gaps between the threads of a fastener and hardens. Loctite 221 and 222 are both low-strength threadlockers. The only slight difference between them is the breakaway torque….