Loctite 277 Threadlocker 50ml

Loctite 277 Threadlocker 50ml is a high-strength red threadlocking adhesive engineered for maximum efficacy in permanent locking and sealing. This industrial-grade adhesive permanently locks and seals threaded fasteners, preventing costly loosening and leakage caused by shock and vibration. Whether you are securing large bolts or studs, this premium anaerobic threadlocker provides a robust, leak-proof seal on all metals—including stainless steel.

Why Choose Loctite 277?

• Prevents Unwanted Movement: Eliminates loosening, leaks, and corrosion caused by intense vibration.
• Broad Metal Compatibility: Offers robust performance on brass, steel, and stainless steel.
• Industrial Contamination Tolerance: Can tolerate slight contaminations of industrial oils during application.
• Suited to Large Threads: High-viscosity formula is ideal for applications where migration of the adhesive must be prevented, specifically on large bolts and studs (M25 and larger).
• High Heat Resistance & Thermal Disassembly: Operates reliably in temperatures ranging from -65°F to 300°F and can be removed with localized heat.

Technical Specifications

• Product Type: Methacrylate-based Anaerobic Threadlocking Adhesive
• Strength: High
• Color: Red (Fluoresces for easy monitoring)
• Container Size: 50ml
• Viscosity: 6,000 - 8,000 mPa.s (cP) Brookfield
• Certifications: Tested to the lot requirements of Military Specification Mil-S-46163A (Regional approval); complies with North American ASTM D5363 general and detail requirements.

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external surfaces with a LOCTITE® cleaning solvent and allow to dry. (Optional: 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.)
2. Apply: For thru holes, apply several drops of the product onto the bolt at the nut engagement area. For blind holes, apply several drops down the internal threads to the bottom of the hole.
3. Assemble: Assemble and tighten the parts as required. The formula will begin curing once confined in the absence of air between close-fitting metal surfaces (fixture time of 25–30 minutes on brass and steel, 270 minutes on stainless steel).

Frequently Asked Questions (FAQ)

What is Loctite 277 used for?

Loctite 277 is a high-strength anaerobic threadlocking adhesive designed for permanent locking and sealing. It is specifically formulated to prevent large threaded fasteners, bolts, and studs (typically M25 and larger) from loosening or leaking due to shock, vibration, and heavy operational stress.

Can Loctite 277 be disassembled?

No, it cannot be removed with standard hand tools alone. To disassemble, you must apply localized heat to the nut or bolt to approximately 250°C and disassemble while hot. Any remaining cured product can be removed using a combination of soaking in a Loctite solvent and mechanical abrasion (like a wire brush).

Does Loctite 277 work on plastics?

No. This product is not normally recommended for use on plastics—particularly thermoplastic materials where stress cracking of the plastic could result. It is designed specifically for metal substrates such as steel, brass, and stainless steel.

Is Loctite 277 safe for oxygen or chemical systems?

No. This product is not recommended for use in pure oxygen and/or oxygen-rich systems, and it should not be selected as a sealant for chlorine or other strong oxidizing materials. Always consult the Material Safety Data Sheet (MSDS) for safe handling information.