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The MILWAUKEE TOOL 49-66-6610 is a 1-inch drive, 55mm, 6-point hex 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 suitable for environments where ignition risk is a concern. The 6-point geometry maximizes contact with fastener flats to reduce rounding under high-torque impact loads. It is designed for use with 1-inch drive impact wrenches and is installed by industrial mechanics, heavy equipment technicians, and journeyman electricians working on large-scale assemblies.
This socket is intended for use in industrial, commercial, and heavy equipment maintenance settings where large-format fasteners require a 1-inch drive tool. The 55mm socket size addresses heavy machinery, structural bolting, and large-frame equipment. Its non-sparking characteristic makes it appropriate for use in environments with flammable gases or vapors, such as refineries, chemical plants, and similar facilities where standard steel tooling is prohibited.
Designed as an OEM-style replacement impact socket for use with 1-inch drive impact wrenches in industrial and heavy equipment applications.
Installation and use should be performed by qualified mechanics or technicians familiar with impact tooling and torque requirements. Always ensure the socket is fully seated on the drive anvil before applying torque. Inspect the socket for cracks or deformation before each use and remove from service if damage is found. Follow applicable OSHA and facility safety standards when operating 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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