Threadlocker 243 Blue 36ml/1.22oz

Loctite Threadlocker 243 Blue is a medium-strength anaerobic threadlocker designed to prevent fasteners from loosening due to vibration and thermal cycling in mechanical assemblies. This 36ml bottle is ideal for firearms maintenance, tactical equipment assembly, and general industrial applications where bolt security is critical.

The product cures in the absence of air between metal surfaces, providing a reliable bond that allows for future disassembly with standard hand tools. Once cured, it offers medium strength, making it suitable for maintenance-prone components. The liquid consistency ensures complete coverage of thread surfaces.

Field technicians, armorer-level firearm owners, and maintenance crews benefit most from this versatile threadlocker for barrel nut installation, scope mount assembly, and rail system fastening. It performs exceptionally on fasteners ranging from 1/4" to 3/4" diameter and is compatible with steel, iron, and various alloys.