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 Friction Ring
Model Number: 44-90-4540
The Milwaukee 44-90-4540 is a genuine OEM Friction Ring for use in compatible Milwaukee impact wrenches. The friction ring is the small rubber o-ring that seats in a groove around the anvil's square drive — gripping the interior of the socket bore to retain the socket on the anvil during impact operation without a mechanical detent pin. The friction ring provides tool-free socket retention: the rubber ring stretches slightly as the socket is pushed on and springs back to grip the socket bore, holding the socket securely while still allowing the operator to pull the socket off by hand when changing. A worn, cracked, cut, or missing friction ring that can no longer grip the socket interior — causing sockets to fall off the anvil during use — requires replacement with a correctly sized ring to restore reliable socket retention.
Using a genuine Milwaukee OEM friction ring ensures the correct inner diameter, cross-section, and rubber compound for the anvil groove it seats in. Non-OEM rings may not match the original dimensions, leading to inadequate socket grip or difficulty installing sockets. Always verify your catalog number and serial number on Milwaukee's website before ordering to confirm this is the correct friction ring for your specific unit.
Features
- Genuine Milwaukee OEM friction ring for compatible Milwaukee impact wrenches
- Rubber o-ring retains sockets on the anvil square drive without a mechanical detent pin
- Allows tool-free socket changes — sockets push on and pull off by hand
- Replacement restores reliable socket retention when original ring wears, cracks, or goes missing
- Verify catalog number and serial number on Milwaukee's website before ordering
Specifications
- Type: Friction Ring
- Material: Rubber
- Application: Socket Retention on Impact Wrench Anvil Square Drive
- Compatibility: Always verify part compatibility using your tool's model and serial number before ordering
Includes
- (1) Milwaukee 44-90-4540 Friction Ring
