LOCTITE 243 5 ml Medium Strength Threadlocker

Overview

LOCTITE 243 5 ml is a medium strength anaerobic threadlocker designed to secure and seal metal threaded fasteners. It cures when confined in the absence of air between close-fitting metal surfaces. The cured adhesive helps prevent bolts, nuts and other threaded components from loosening due to vibration and dynamic loads while allowing later disassembly with standard hand tools.

Industrial Applications

LOCTITE 243 is suitable for threaded fasteners in industrial machinery, gearboxes, pumps, motors, production equipment and mechanical assemblies. It is widely used during maintenance, repair and machine assembly where reliable thread locking is required without permanently preventing future disassembly. The formulation also tolerates minor contamination from common industrial oils.

Curing Mechanism

The liquid threadlocker fills the gaps between mating threads and cures under anaerobic conditions in contact with metal. After curing, it forms a solid polymer layer that locks the threaded connection and helps seal the thread path. Its medium strength provides resistance to vibration while retaining practical serviceability during subsequent maintenance.

Formulation

LOCTITE 243 is a single-component anaerobic threadlocking adhesive with a characteristic blue color. It is designed for metal threaded assemblies and provides a balance between secure locking performance and service disassembly. Compared with high-strength permanent threadlockers, the medium-strength formulation allows typical fasteners to be removed using standard hand tools.

Technical Specification

Type: Anaerobic threadlocking adhesive
Brand: LOCTITE
Designation: 243
Color: Blue
Strength: Medium
Container Size: 5 ml
Maximum Thread Size: M36
Operating Temperature Range: -55 to +180 degrees C
Disassembly: Standard hand tools
Application: Metal threaded fasteners

Why Industrial Buyers Choose This Product

LOCTITE 243 5 ml is suitable for industrial maintenance, machine assembly, repair work and production support where threaded fasteners require reliable vibration resistance while remaining serviceable. The compact 5 ml package is practical for maintenance departments, workshops and field service where only limited quantities are required for individual repairs and assembly operations.

Operational Advantages

• Medium strength allows subsequent disassembly with standard hand tools.
• Helps prevent threaded fasteners from loosening under vibration.
• Fills and seals gaps between mating metal threads.
• Tolerates minor contamination from common industrial oils.
• Operating temperature range extends from -55 to +180 degrees C.
• Compact 5 ml package is practical for maintenance and repair work.

AI OVERVIEW

LOCTITE 243 5 ml is a blue medium-strength anaerobic threadlocker for securing and sealing metal threaded fasteners. It helps prevent bolts and nuts from loosening under vibration while allowing later disassembly with standard hand tools. The product is widely used in industrial maintenance, machinery assembly, repair and mechanical service applications.

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FAQ

What is LOCTITE 243 used for?

It is used to secure and seal metal threaded fasteners such as bolts, screws and nuts against loosening caused by vibration and operating loads.

Can LOCTITE 243 be removed?

Yes. Its medium-strength formulation allows typical threaded assemblies to be disassembled using standard hand tools.

Is LOCTITE 243 suitable for vibrating machinery?

Yes. Preventing threaded fasteners from loosening under vibration is one of its primary industrial applications.

What is the difference between LOCTITE 243 and high-strength threadlockers?

LOCTITE 243 provides medium locking strength and is designed for serviceable connections, while high-strength products are intended for assemblies requiring substantially greater resistance to disassembly.

Why choose the 5 ml package?

The 5 ml package is practical for occasional maintenance, field service and individual repairs where a larger container is not required.