LOCTITE 243 Blue Medium Strength Threadlocker

Features and Benefits

LOCTITE 243 is a medium strength blue threadlocking adhesive that seals and secures metal nuts and bolts to prevent loosening due to shock and vibration.
LOCTITE® 243 is a general purpose threadlocker that provides a medium strength bond. LOCTITE 243 works on all metals, including passive substrates such as stainless steel, aluminum and plated surfaces. It is proven to be tolerant of minor contamination due to industrial oils, e.g., motor oils, corrosion prevention oils and cutting fluid.
  • Prevents loosening on vibrating assemblies, e.g. pumps, gear boxes or presses
  • Works on all metals, including passive substrates (e.g. stainless steel, aluminum, plated surfaces)
  • Proven to tolerate minor contamination by industrial oils, e.g. motor oils, corrosion prevention oils and cutting fluids
  • Permits disassembly with hand tools for servicing
  • P1 NSF Reg. No.: 123000
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Technical Information

Application Method Dispense Gun, Dispense System, Manual
Application Temperature -55.0 - 180.0 °C (-65.0 - 360.0 °F )
Applications Threadlocking
Breakaway Torque, M10 Steel Nuts/Bolts ~26.0 N·m (230.0 in./lb. )
Color Blue
Cure Type Anaerobic Cure
Fixture Time 10.0 min.
Key Characteristics Disassembly: Removable, Fluorescent, General Purpose, Oil Tolerant, Primerless, Strength: Medium Strength, Thixotropic
Physical Form Liquid
Prevail Torque, M10 Steel Nuts/Bolts 5.0 N·m (40.0 in./lb. )
Specific Gravity, @ 23.0 °C 1.08
Substrates Metal, Metal: Passive Metal
Technology Acrylic
Viscosity, Speed 20 RPM 2150.0 mPa·s (cP)