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The MILWAUKEE TOOL 49-66-6519 is a 1-inch drive, 1-15/16-inch hex impact socket built for heavy-duty fastening applications. The 6-point hex drive geometry delivers full contact on fastener flats, reducing rounding under high-torque impact conditions. Constructed from steel with a black phosphate finish, this standard-length socket resists corrosion and wear in demanding shop and field environments. The non-sparking designation makes it suitable for use in environments where ignition risk is a concern. Licensed electricians, industrial mechanics, and heavy equipment technicians are the primary installers for sockets in this drive class.
This impact socket is sized for large fasteners commonly found on heavy machinery, structural connections, commercial HVAC equipment, large-diameter pipe flanges, and similar industrial assemblies. The 1-inch drive size is standard on high-torque pneumatic and hydraulic impact wrenches used in heavy-duty industrial and construction settings. The standard-length profile fits most accessible fastener locations without requiring an extension.
Designed as an OEM-style impact socket for use with 1-inch drive impact wrenches and ratchets requiring a 1-15/16-inch, 6-point hex socket.
This socket is intended for use by qualified mechanics and tradespeople operating 1-inch drive impact tools. Always verify the drive tool and socket are rated for the applied torque before use. Inspect the socket for cracks, chips, or deformation before each use and remove from service if damage is found. Although this socket carries a non-sparking designation, always confirm suitability with your site safety officer before use in classified hazardous locations.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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