Milwaukee Tool 49-66-6420 Impact Socket 3/4 in 45mm

Product Description

The MILWAUKEE TOOL 49-66-6420 is a 6-point impact socket designed for heavy-duty fastening applications in trade and industrial environments. Built for use with 3/4 inch drive impact wrenches, this socket accepts a 45mm hex fastener and features a standard-length profile. The black phosphate finish provides corrosion resistance, and the non-sparking steel construction makes it suitable for use in environments where spark ignition is a concern. Licensed electricians, pipefitters, millwrights, and mechanical contractors who work with large-diameter fasteners will find this socket a reliable fit for their impact drive lineup.

This socket is well suited for commercial and industrial mechanical work where large hex fasteners are common, including equipment installation, structural steel assembly, and heavy machinery maintenance. The standard-length body accommodates typical fastener access points without requiring an extension in most applications. The 6-point contact geometry reduces the likelihood of rounding fastener heads under high-torque impact conditions, which is a practical advantage when breaking loose corroded or overtorqued hardware.

Key Features

• 3/4 inch drive sizing compatible with standard 3/4 inch impact wrenches and ratchets
• 45mm 6-point hex socket for secure contact on large hex fasteners
• Non-sparking steel construction rated for use in spark-sensitive environments
• Black phosphate finish for added corrosion resistance
• Standard-length profile for general-access fastening tasks
• Not insulated — not rated for live electrical work

Compatibility

Designed as a replacement-style impact socket for use with 3/4 inch drive impact wrenches and drive tools requiring a 45mm 6-point hex socket.

Installation Notes

Install and remove using a 3/4 inch drive impact wrench or breaker bar — confirm the socket is fully seated on the drive anvil before applying torque. Power down or de-energize any equipment before accessing fasteners on electrical or mechanical systems. This socket is not insulated and must not be used on or near energized conductors. Follow applicable site safety and tool-use guidelines when operating impact tools in hazardous or spark-sensitive areas.