LOCTITE 277 Large Bolt High Strength Red Threadlocker

Red, high strength, high viscosity methacrylate-based threadlocking adhesive, suited to large threads. Fluoresces to allow monitoring.

LOCTITE® 277™ Large Bolt High Strength Red Threadlocker locks fasteners up to 1 1/2" (36 mm). Protects threads from rust and corrosion. Removable with heat and hand tools. Mil Spec: Mil-S-46163A Type I Grade L. ASTM-D5363: Group 2 Class 1 Grade 1.

Your benefits

  • High viscosity
  • Breakaway torque on M10 bolts of 32 Nm
  • Prevents unwanted movement, loosening, leaks and corrosion
  • Resists vibration
  • High strength
  • Suited to large threads


Applications Permanent High Strength
Agency Approvals / Specifications MIL-S-46163A for existing designs, ASTM D-5363
Color Red
Cure Type Anaerobic Cure
Fixture Time 60 min.
Full Cure Temperature (°C) 25
Full Cure Temperature (°F) 77
Full Cure Time 24 hr.
Key Characteristics Strength: High Strength, Permanent
Number of Components 1 Part
Physical Form Liquid
Temperature Range (°C) -54 to 149
Temperature Range (°F) -65 to 300
Thread Size (Maximum) (in.) 7/8
Torque Break on M10 Steel (in./lb.) 275
Torque Prevail on M10 Steel (in./lb.) 275
Viscosity (Brookfield mPa.s (cP)) 7000
Viscosity Temperature (°C) 25
Viscosity Temperature (°F) 77