Loctite 290 Threadlocker 50ml

Loctite 290 Threadlocker 50ml is a medium-to-high strength green threadlocking liquid engineered for maximum efficacy in locking and sealing threaded fasteners. This industrial-grade adhesive permanently locks preassembled fasteners, preventing costly loosening and leakage caused by shock and vibration. Whether you are securing instrumentation fasteners or electrical connectors, this premium anaerobic threadlocker provides a robust, leak-proof seal on all metal surfaces—including stainless steel and brass.

Why Choose Loctite 290?

• Preassembled Application: Low viscosity and capillary action allow the product to wick between engaged threads, completely eliminating the need for disassembly prior to application.
• Metal-Focused Sealing: Engineered to deliver highly reliable performance exclusively on metal substrates like steel, stainless steel, and brass.
• Oil Tolerant Formula: Proven to be highly tolerant of minor surface contamination due to common industrial oils, such as motor oils, corrosion prevention oils, and cutting fluids.
• Multi-Purpose Functionality: Ideal for heavy-duty use cases like securing set screws, instrumentation fasteners, electrical connectors, and filling porosities in welds, castings, and powdered metal parts.
• Thermal Resiliency & Heat-Required Removal: Withstands extreme operating temperatures ranging from -65°F to 300°F and securely holds until localized heat (~250°C) is applied for clean disassembly.

Technical Specifications

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external threads (bolt and hole) with a LOCTITE® cleaning solvent and allow them to dry completely.
2. Apply: For preassembled through-holes, apply several drops of the liquid threadlocker at the screw and body juncture. For blind holes, apply several drops down the internal threads to the bottom of the hole.
3. Assemble: Assemble, tighten, or leave the preassembled parts as required. The formula will begin curing anaerobically once it is confined in the absence of air between close-fitting metal surfaces.

Frequently Asked Questions (FAQ)

What is Loctite 290 used for?

Loctite 290 is a medium-to-high strength anaerobic threadlocker designed for the locking and sealing of threaded fasteners. It is specifically formulated to prevent preassembled fasteners, electrical connectors, and instrumentation set screws from loosening or leaking due to intense shock and vibration.

Can Loctite 290 be disassembled?

Yes, but it requires localized heat. Because of its medium-to-high strength properties, you must apply localized heat to the nut or bolt to approximately 250°C if standard hand tools cannot break the bond due to excessive engagement length. Disassemble the components while they are still hot.

Does Loctite 290 work on plastic?

No, it works on metal only. Loctite 290 is not normally recommended for use on plastics, particularly thermoplastic materials, where stress cracking of the plastic could potentially result.

Is Loctite 290 safe for water processing systems?

Yes. Loctite 290 is certified to ANSI/NSF Standard 61 for use in commercial and residential potable water systems, provided the water temperature does not exceed 82°C. It is also registered to NSF Category P1 for use as a sealant in and around food processing areas where there is no possibility of direct food contact.