Milwaukee Tool 49-57-5359 Hex Rethreading Die M12x1.5

Product Description

The MILWAUKEE TOOL 49-57-5359 is a hex rethreading die designed to restore damaged or corroded metric external threads on fasteners, studs, and threaded rod. It cuts an M12x1.5 thread profile and is built from carbon steel for durability in field and shop use. The hex-shaped body measures 1.0 inch across flats, allowing a standard wrench to drive the die without a dedicated die stock. At 0.5 inch thick, it is compact enough for tight-clearance work. Licensed electricians, plumbers, pipefitters, and mechanical contractors use rethreading dies when existing threads are too damaged to accept a nut cleanly, saving time versus cutting and retapping entirely new threads.

This die is suited for residential and commercial maintenance applications where metric fasteners are common, including equipment with metric hardware, conduit fittings, hydraulic components, and machinery bolting. The M12x1.5 thread designation is a metric special pitch, meaning it does not follow the standard M12x1.75 coarse pitch. Verify the thread pitch of the fastener before use. The right-hand thread direction matches standard metric fasteners tightened clockwise.

Key Features

• M12x1.5 metric special pitch restores threads not addressed by standard coarse-pitch dies
• Carbon steel construction provides hardness suitable for rethreading steel and iron fasteners
• 1.0 inch hex body drives with a standard open-end or combination wrench — no die stock required
• 0.5 inch thickness keeps the die compact for access in confined spaces
• Right-hand thread direction matches conventional metric fastener rotation
• Hex-LOK series design for consistent grip and torque transfer during rethreading

Compatibility

Designed for use on external M12x1.5 metric special right-hand threaded fasteners, studs, and rod. Confirm thread pitch with a thread gauge before selecting this die, as M12x1.5 differs from the standard M12 coarse pitch of 1.75.

Installation Notes

Rethreading dies are typically used by trade mechanics, electricians, and pipefitters performing equipment maintenance or repair. Secure the workpiece before applying the die, and apply cutting oil or thread lubricant to reduce friction and extend die life. Start the die straight onto the fastener to avoid cross-threading. Do not force the die past damaged thread sections that cannot be cleaned up — evaluate whether fastener replacement is the safer option.