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Small red bottle of Loctite 277 threadlocker 10 mL

Loctite

Loctite 277 Red High Strength Threadlocker 10 mL

SKU CH-BS8C-1RQK9

High-strength red threadlocker for metal fasteners up to 7/8 in, anaerobic cure in 45 minutes with 280 in-lb breakaway torque

  • High-strength locking holds fasteners to 280 in-lb breakaway torque
  • Red anaerobic formula secures threads up to 7/8 in diameter
  • Oil-tolerant chemistry bonds reliably on contaminated metal surfaces
  • 45-minute working time allows precise assembly before cure begins
  • Meets ASTM D-5363 and MIL-S-46163-A aerospace and industrial standards

High-Strength Threadlocker for Metal Fasteners

Loctite 277 is a red, anaerobic adhesive designed to permanently lock threaded assemblies on brass, bronze, copper, iron, steel and similar metals. The liquid formula fills gaps up to a maximum thread diameter of 7/8 in and develops a breakaway torque of 280 in-lb once cured. It meets ASTM D-5363 and MIL-S-46163-A specifications for reliable performance in demanding environments.

Suited for Permanent Assemblies Requiring Heat

This product suits mechanics and engineers who need a permanent bond that resists vibration, shock and oil contamination. It is not intended for applications where frequent disassembly with hand tools is required, nor for use on plastic or non-metallic substrates that the anaerobic chemistry does not support. Buyers needing a lower-strength or removable grade should select a different threadlocker series.

10 mL Bottle Handles Multiple Large-Diameter Joints

The 10 mL container provides enough liquid for numerous fasteners up to the stated 7/8 in diameter limit. With a 45-minute working time, there is ample opportunity to position parts before the cure begins. Coverage will run out on very high-volume production runs or on threads significantly larger than the specified maximum, requiring additional bottles.

Highlights

  • High-strength locking holds fasteners to 280 in-lb breakaway torque
  • Red anaerobic formula secures threads up to 7/8 in diameter
  • Oil-tolerant chemistry bonds reliably on contaminated metal surfaces
  • 45-minute working time allows precise assembly before cure begins
  • Meets ASTM D-5363 and MIL-S-46163-A aerospace and industrial standards

Specifications

BrandLOCTITE

Questions about this item

What thread size can I use this 10 mL bottle on?

The threadlocker works on fasteners up to 7/8 in maximum diameter, so typical coarse or fine threads at or below that size are covered.

Will it still lock bolts that have some oil residue from the engine?

Yes, the formulation is oil tolerant and will cure anaerobically even when light oil films remain on brass, steel or other listed metals.

How long after assembly should I wait before the joint reaches full strength?

Allow 45 minutes working time for positioning, then let the anaerobic cure develop; full breakaway torque of 280 in-lb is achieved after the standard cure period.

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