The Milwaukee 42-66-0200 is a genuine OEM replacement keyless chuck designed for compatible Milwaukee drills and driver-drills. When your existing chuck no longer grips bits securely, has seized jaws, or has damaged threads, this direct OEM replacement restores full bit retention and safe drill operation quickly and reliably.

The keyless design allows chuck jaws to be tightened and loosened by hand without the need for a separate chuck key, enabling fast one-hand bit changes right on the jobsite. It accepts drill bits, driver bits, and round-shank accessories up to 1/2 in., covering the full range of common drilling and driving applications.

As a genuine Milwaukee OEM part, the 42-66-0200 is built to the correct spindle thread specification, jaw capacity, and chuck body dimensions for the drills it serves. Always verify your catalog number and serial number on Milwaukee's website before ordering to confirm this is the correct chuck for your specific unit.

Specifications

• Brand: Milwaukee Tool
• Part Number: 42-66-0200
• Type: Keyless Chuck
• Chuck Capacity: 1/2 in.
• Part Classification: Genuine OEM Replacement Part
• Compatible Tool: Milwaukee 2603-20 and Compatible Milwaukee Drills and Driver-Drills
• Application: Bit and Accessory Retention on Output Spindle

Features

• Genuine Milwaukee OEM Part - correct spindle thread spec, jaw capacity, and dimensions
• Keyless Design - fast one-hand bit changes without a chuck key
• 1/2 in. Chuck Capacity - accepts drill bits, driver bits, and round-shank accessories
• Threads onto Output Spindle - secured by chuck retaining screw for reliable hold
• Direct OEM Replacement - restores bit retention and safe drill operation
• Replaces Worn, Seized, or Damaged Chucks
• Verify Catalog and Serial Number on Milwaukee Website Before Ordering
• Ideal for Milwaukee Drills and Driver-Drills Repair and Maintenance

Condition: New