Directions for use: For Assembly
1. For best results, clean all surfaces (external and internal) with a LOCTITE® cleaning solvent and allow to dry.
2. If the material is an inactive metal or the cure speed is too slow, spray all threads with Activator 7471™ or 7649™ and allow to dry.
3. Shake the product thoroughly before use.
4. To prevent the product from clogging in the nozzle, do not allow the tip to touch metal surfaces during application.
5. For Thru Holes, apply several drops of the product onto the bolt at the nut engagement area.
6. For Blind Holes, apply several drops of the product down the internal threads to the bottom of the hole.
7. Assemble and tighten as required.
8. For Sealing Applications, apply a 360° bead of product to the leading threads of the male fitting, leaving the first thread free. Force the material into the threads to thouroughly fill the voids. For bigger threads and voids, adjust product amount accordingly and apply a 360° bead of product on the female threads also.
LOCTITE® 221 is a methacrylate-based threadlocking adhesive designed for low energy functions on small threads up to a most dimension of M12. Typical fixture instances are 25, 20 and 210 min on steel, brass and stainless metal respectively. Offering low viscosity and a breakaway torque of 8.5 Nm, the product is designed for fasteners that require convenient disassembly with popular hand tools.
