Milwaukee Tool 49-66-6521 Impact Socket 1 in Drive 2-1/4 in

Product Description

The MILWAUKEE TOOL 49-66-6521 is a 1-inch drive, 2-1/4-inch, 6-point impact socket built for heavy-duty fastening applications. Constructed from steel with a black phosphate finish, this standard-length socket is rated non-sparking, making it appropriate for use in environments where ignition risk is a concern. The 6-point geometry maximizes contact with fastener flats, reducing rounding under high-torque impact loads. Installed by electricians, pipefitters, millwrights, and industrial maintenance technicians, this socket is designed to hold up to the sustained percussion and torque output of 1-inch drive impact wrenches.

This socket is suited for industrial, commercial, and heavy construction applications where a large 2-1/4-inch hex fastener must be driven or removed with impact tooling. The non-sparking designation makes it a fit for petrochemical, mining, and other hazardous-location work sites where standard steel tooling is not permitted. Standard length geometry supports use in open, unobstructed fastener locations typical of structural and mechanical assembly work.

Key Features

• 1-inch square drive compatible with heavy-duty impact wrenches
• 2-1/4-inch socket size for large hex fasteners
• 6-point drive geometry reduces fastener rounding under impact loads
• Non-sparking construction rated for hazardous-location use
• Black phosphate finish for corrosion resistance
• Standard length design for general-access fastening

Compatibility

Designed as an OEM-style replacement and direct-fit impact socket for 1-inch drive impact wrenches requiring a 2-1/4-inch 6-point hex socket.

Installation Notes

Installation and use of this socket should be performed by qualified tradespeople familiar with 1-inch drive impact tooling. Ensure the impact wrench is fully depowered or disconnected from its air or power source before changing sockets. Confirm the socket is fully seated on the drive anvil and the retaining pin or ring is secured before operation. In classified hazardous locations, verify the complete tool assembly meets site safety requirements before use.