Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukees website please click here:
Milwaukee Anvil Spring
Model Number: 40-50-0012
The Milwaukee 40-50-0012 is a genuine OEM Anvil Spring for use in compatible Milwaukee impact wrenches and impact drivers. The anvil spring is the small precision spring within the anvil assembly that loads the detent pin or retention element — keeping the detent pin pressed into its engagement groove to retain the socket on the anvil square drive during impact operation. The spring must maintain consistent spring force to hold the detent pin engaged against the outward force of impact cycles and the inertial loading of the attached socket, while still allowing the operator to push the detent pin in to release the socket when needed. A broken or fatigued anvil spring that allows the detent pin to retract — causing sockets to fall off the anvil during use — requires replacement to restore reliable socket retention and safe impact wrench operation.
Using a genuine Milwaukee OEM anvil spring ensures the correct wire diameter, free length, and spring rate for the detent mechanism it serves. Always verify your catalog number and serial number on Milwaukee's website before ordering to confirm this is the correct anvil spring for your specific unit.
Features
- Genuine Milwaukee OEM anvil spring for compatible Milwaukee impact wrenches and impact drivers
- Loads the detent pin to retain sockets on the anvil square drive during impact operation
- Maintains consistent spring force to hold the detent through impact cycling and socket inertia
- Replacement restores reliable socket retention when original spring breaks or fatigues
- Verify catalog number and serial number on Milwaukee's website before ordering
Specifications
- Type: Anvil Spring
- Material: Spring Steel
- Application: Detent Pin Loading for Socket Retention on Impact Wrench Anvil
- Compatibility: Always verify part compatibility using your tool's model and serial number before ordering
Includes
- (1) Milwaukee 40-50-0012 Anvil Spring
