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 Chain Tensioner Main Screw for 2727-20
Model Number: 05-89-8001
The Milwaukee 05-89-8001 is a genuine OEM Chain Tensioner Main Screw for the Milwaukee M18 FUEL 16 in. Chainsaw (2727-20). The chain tensioner main screw is the threaded body component of the tensioner assembly that houses and interfaces with the chain tensioner adjustment screw — together they drive the chain tensioning post forward or backward to position the guide bar and set the correct chain tension. As the adjustment screw is turned, it threads through the main screw body to push the tensioning post and bar into the correctly tensioned position. A stripped, corroded, or damaged main screw that can no longer properly interface with the adjustment screw or guide the tensioning post requires replacement to restore accurate, reliable chain tension adjustment on the saw.
This main screw features a left-hand thread — an important distinction from similar chain tensioner main screws in the Milwaukee lineup such as the 05-89-0018, which uses a right-hand thread for different compatible tools. Always confirm the correct part number from your tool's service parts diagram before ordering to ensure the correct thread direction. Using a genuine Milwaukee OEM chain tensioner main screw ensures the correct thread specification, thread direction, and dimensional fit within the tensioner assembly for the 2727-20. Always verify your catalog number and serial number on Milwaukee's website before ordering to confirm this is the correct main screw for your specific unit.
Features
- Genuine Milwaukee OEM chain tensioner main screw for M18 FUEL 16 in. Chainsaw 2727-20
- Houses and interfaces with the adjustment screw to drive the tensioning post and position the guide bar
- Left-hand thread — confirm thread direction before ordering, as similar screws use right-hand thread
- Works as part of the complete chain tensioning system alongside the tensioning post and adjustment screw
- Verify catalog number and serial number on Milwaukee's website before ordering
Specifications
- Thread Direction: Left-Hand
- Compatible Tool: M18 FUEL 16 in. Chainsaw 2727-20
Includes
- (1) Milwaukee 05-89-8001 Chain Tensioner Main Screw
