Milwaukee 42-66-0020 Keyless Chuck 1/2 in.

**Milwaukee parts change not only by model# but also by serial number. Milwaukee’s site lets youlook up your tool’s parts diagram.Milwaukee 1/2 in. Keyless ChuckModel Number: 42-66-0020The Milwaukee 42-66-0020 is a genuine OEM 1/2 in. Keyless Chuck for use in compatible Milwaukee drills and driver-drills. The chuck is the bit retention mechanism at the front of the drill that grips drill bits, driver bits, and other round-shank accessories securing them to the output spindle during drilling and driving operations. A keyless design allows the chuck jaws to be tightened and loosened by hand without the need for a separate chuck key, enabling fast, one-hand bit changes on the jobsite. Milwaukee uses a chuck retaining screw inside the chuck to secure the assembly to the spindle the chuck threads onto the spindle and the retaining screw (typically left-hand thread) locks it in place. A chuck that no longer grips bits securely, has seized jaws, or has damaged threads requires replacement to restore bit retention and safe drill operation.Using a genuine Milwaukee OEM keyless chuck ensures the correct spindle thread specification, jaw capacity, and chuck body dimensions for the drill 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.FeaturesGenuine Milwaukee OEM 1/2 in. keyless chuck for compatible Milwaukee drills and driver-drillsKeyless design enables fast, one-hand bit changes without a separate chuck keyAccepts drill bits, driver bits, and round-shank accessories up to 1/2 in.Threads onto the output spindle and is secured by an internal chuck retaining screwVerify catalog number and serial number on Milwaukee’s website before orderingSpecificationsType: Keyless ChuckChuck Capacity: 1/2 in.Application: Bit and Accessory Retention on Output SpindleCompatibility: Always verify part compatibility using your tool’s model and serial number before orderingIncludes(1) Milwaukee 42-66-0020 1/2 in. Keyless Chuck