LOCTITE 242 | Blue Medium Strength Threadlocker – 10 mL

LOCTITE 242 Blue Medium Strength Threadlocker – 10 mL

LOCTITE 242 Threadlocker is a blue, medium-strength threadlocking adhesive designed to lock and seal threaded metal fasteners while helping prevent loosening caused by vibration and shock. Its removable formula provides dependable fastener retention while still allowing disassembly with standard hand tools for future maintenance and repairs.

The 10 mL bottle is an excellent size for professional mechanics, diesel repair shops, fleet maintenance operations, service trucks, automotive technicians, and equipment repair facilities. LOCTITE 242 is ideal for bolts, nuts, studs, and other threaded metal fasteners that need reliable locking strength without requiring a permanent bond.

LOCTITE 242 Features

• Product: LOCTITE 242 Threadlocker
• Size: 10 mL
• Color: Blue
• Strength: Medium Strength
• Locks and seals threaded metal fasteners
• Helps prevent loosening caused by vibration and shock
• Removable with standard hand tools
• Helps prevent leakage through threaded assemblies
• Helps protect threads against rust and corrosion
• Anaerobic-curing threadlocking adhesive
• Designed for metal threaded fasteners
• Ideal for applications requiring future service or disassembly

Blue Medium Strength Threadlocker

LOCTITE 242 provides medium-strength fastener retention for components that need protection against vibration but may also require future removal. Once applied to the threads and assembled, the anaerobic formula cures between close-fitting metal surfaces to help secure the fastener in place.

Unlike high-strength red threadlocker, LOCTITE 242 is designed so properly applied fasteners can typically be removed using standard hand tools. This makes it a versatile choice for routine repair, maintenance, and service applications.

Heavy-Duty Truck & Diesel Applications

LOCTITE 242 is well suited for professional heavy-duty truck, diesel engine, automotive, fleet, construction equipment, agricultural, and industrial maintenance applications where threaded fasteners are exposed to vibration during operation.

• Heavy-duty truck repairs
• Diesel engine components
• Automotive repairs
• Fleet maintenance
• Engine accessory fasteners
• Transmission and drivetrain components
• Equipment mounting bolts
• Construction equipment
• Agricultural equipment
• Industrial machinery
• Bolts, nuts, studs, and threaded fasteners

Helps Prevent Fasteners from Loosening

Vibration and repeated operating cycles can cause conventional threaded fasteners to gradually loosen. LOCTITE 242 fills the microscopic spaces between mating threads and cures to form a secure bond, helping maintain fastener integrity while also sealing the threaded connection.

The cured threadlocker also helps protect threaded surfaces from moisture and corrosion, which can make future maintenance easier.

LOCTITE 242 Blue vs. Red Threadlocker

Blue LOCTITE 242 is a medium-strength threadlocker designed for fasteners that may need to be removed during normal maintenance. It provides vibration resistance while remaining serviceable with standard hand tools.

Red high-strength threadlockers such as LOCTITE 262 and LOCTITE 263 are intended for applications requiring significantly stronger or more permanent fastener retention and may require localized heat during disassembly.

Product Specifications

• Brand: LOCTITE
• Product: 242 Threadlocker
• Product Type: Medium Strength Threadlocker
• Color: Blue
• Container Size: 10 mL
• Cure Type: Anaerobic
• Chemical Base: Methacrylate
• Strength: Medium
• Removal: Standard hand tools
• Application: Threaded metal fasteners

Application Instructions

For best results, clean and degrease threaded surfaces before applying LOCTITE 242. Apply the threadlocker to the threaded portion of the fastener and assemble according to the component manufacturer's specifications. Allow sufficient curing time before placing the assembly into service.

Application Note

LOCTITE 242 is intended for medium-strength, serviceable threaded assemblies. Always verify that the threadlocker is appropriate for the fastener material, size, operating temperature, and specific application before use.