LOCTITE 270 high-strength threadlocker

LOCTITE 270 – High-strength threadlocker for permanent metal joints

LOCTITE 270 is the preferred choice when screw connections need to be permanently and permanently secured. This high-strength threadlocker is ideal for use on bolts, studs, threaded rods, nuts, and other metal fasteners where reliable protection against loosening due to shock, vibration, or high stress is required. Thanks to its low viscosity, LOCTITE 270 penetrates thread gaps optimally and guarantees full-surface protection.

Anaerobic curing begins as soon as the adhesive is sealed off from the air between closely fitting metal surfaces. LOCTITE 270 achieves very high final strength—even on passive metals such as stainless steel, chrome-plated or zinc-plated surfaces, as well as on typical active metals such as brass and copper. Even slight surface contamination with oils (e.g., cutting, lubricating, or anti-corrosion oils) does not affect performance.

With a breaking strength of up to 33 Nm (M10 steel), excellent chemical and temperature resistance up to +150 °C, and NSF P1 approval for use in food-related production, LOCTITE 270 is ideal for machine and plant construction, automotive engineering, maintenance, and industrial assembly.

product features

• Color: green (fluoresces under UV light)
• Strength class: high strength, for permanent fastenings
• Chemistry: Dimethacrylate ester, single-component, anaerobic curing
• Viscosity (25 °C): 450–500 mPa·s (low viscosity, capillary active)
• Breaking torque (M10 steel): 33 Nm
• Breakaway torque (M10 steel): 33 Nm
• Maximum thread size: suitable for M16 and larger
• Shear strength (steel): ≥9 N/mm²
• Temperature range: -55 °C to +150 °C
• Oil resistance: Resistant to engine oil, brake fluid, fuels, ethanol, biodiesel, DEF (AdBlue), water/glycol, diluted acids, and bases
• NSF approval: Category P1 (only for applications without food contact)
  
  

Suitable materials

LOCTITE® 270 is particularly suitable for use with:

• Steel and stainless steel
• Brass and copper
• Passivated, coated, or galvanized metal surfaces
• Not recommended for plastics (especially thermoplastics)
  
  

Typical areas of application

• Screw connections on motor and pump housings
• Stud bolts, threaded rods, bearing caps
• Nuts on stud bolts in heavily loaded areas
• Assemblies in mechanical and plant engineering
• Heavy-duty connections and fastenings in agricultural machinery, construction vehicles, and commercial vehicles
• Assembly of flange connections and flange bolts
• Maintenance and repair (e.g., dismantling safety device)
  
  

Processing instructions

1. Preparation: Clean screw connections (e.g., with LOCTITE cleaner); slight oil residues are tolerated.
2. Application: Apply the product to the male thread or, in the case of blind holes, directly into the hole.
3. Assembly: Install the screw connection immediately and tighten to the desired torque.
4. Curing time: Handleable after approx. 10–30 minutes, final strength after 24 hours.
5. Disassembly: Connection can only be broken by heating to approx. 250 °C and then loosening with tools.
6. Cleaning: Hardened residues can be removed mechanically (e.g., wire brush) and by soaking in solvent.