3M Scotch-weld 7100039159 Low Strength Threadlocker 50 Ml

Product Description

The 3M SCOTCH-WELD 7100039159 is a low-strength, purple liquid threadlocker in the TL22 series, packaged in a 50 mL bottle. It is designed to secure threaded fasteners against vibration loosening while allowing removal with standard hand tools, making it appropriate for assemblies that require periodic disassembly or adjustment. Fixture time is 20 minutes and full cure is achieved in 24 hours. Maximum operating temperature is 300 degrees F, and minimum operating temperature is -65 degrees F. It meets MIL-S-46163A standard requirements. Licensed HVAC technicians, plumbers, electricians, and industrial mechanics install this product on threaded connections that must be serviceable without heat or power tools.

This threadlocker is intended for use on small to medium fasteners up to 5/16 inch in diameter where low-strength, removable locking is required. Typical applications include set screws, adjustment screws, and instrument fasteners in residential and light commercial mechanical, HVAC, plumbing, and electrical installations. The purple color coding identifies it as a low-strength formulation, distinguishing it visually from medium- and high-strength grades on the job site. It is well suited for any assembly where fastener access for routine maintenance or calibration is expected.

Key Features

• Low-strength formula allows removal with standard hand tools — no heat required
• Fixture time of 20 minutes with full cure in 24 hours
• Operating temperature range: -65 degrees F to 300 degrees F
• Meets MIL-S-46163A military specification for anaerobic thread-locking compounds
• Purple color coding for quick visual identification as low-strength grade
• 50 mL bottle with a breakaway torque range of 40 to 100 lb./inch

Compatibility

Designed for use on threaded fasteners up to 5/16 inch in diameter. Suitable for metal threaded assemblies in HVAC, plumbing, electrical, and general industrial applications where a low-strength, removable threadlocker is specified.

Installation Notes

Clean and degrease mating threads before applying this threadlocker to ensure proper adhesion and cure. Apply to the fastener threads and assemble within the 20-minute working time. Allow a full 24-hour cure before placing the assembly into service under load. Follow applicable codes and the manufacturer safety data sheet when working in enclosed spaces or around ignition sources, as anaerobic adhesives contain reactive monomers.