Milwaukee Tool 49-66-6316 Impact Socket 3/4 in Drive

Product Description

The MILWAUKEE TOOL 49-66-6316 is a 3/4 inch drive impact socket designed for heavy-duty fastening applications in trade and industrial environments. Built from steel with a black phosphate finish, this 6-point socket fits 1-9/16 inch hex fasteners and is rated non-sparking, making it suitable for use in environments where spark hazard is a concern. The standard-length design accommodates common fastener depths without the added reach of a deep socket. Licensed electricians, pipefitters, millwrights, and mechanical contractors reach for impact-rated sockets like this when driving or breaking loose large fasteners with pneumatic or cordless impact wrenches.

This socket is suited for residential, commercial, and light industrial fastening tasks where a 3/4 inch drive impact wrench is the tool of choice. Typical applications include structural steel assembly, heavy equipment maintenance, flange work, and large-diameter pipe fitting connections. The 6-point contact geometry reduces the risk of rounding fastener corners under high torque, which is especially important when breaking loose corroded or over-torqued hardware.

Key Features

• 3/4 inch drive fits standard 3/4 inch drive impact wrenches and ratchets
• 1-9/16 inch 6-point hex socket for secure fastener engagement under high torque
• Non-sparking construction suitable for hazardous or sensitive environments
• Black phosphate finish provides corrosion resistance and reduces glare
• Standard length profile for everyday fastening depth requirements
• Not insulated — confirm application requirements before use in electrical service work

Compatibility

Designed as a standard 3/4 inch drive impact socket compatible with 3/4 inch drive impact wrenches, ratchets, and extensions that accept square drive tooling.

Installation Notes

Impact sockets must be used with impact-rated drive tools only — do not use with standard hand-ratchet sets, as impact forces can crack non-impact-rated sockets. Ensure the socket is fully seated on the fastener before applying torque to prevent slippage or fastener damage. In environments where the non-sparking rating is required, verify that all connected drive components also meet the applicable non-sparking standard for the job site.