Description
Overview:
This genuine Stihl lockwasher (OEM 4859 640 8900) is a small but critical fastening component used to keep nuts and bolts securely tightened on hedge trimmers that experience continuous vibration. Made from durable steel, it sits beneath a nut or bolt head to increase friction and resist loosening under vibration and torque. It is engineered specifically for Stihl long‐reach hedge trimmers and delivers the fit and performance expected from an OEM part. Ideal for maintenance and repairs on models such as the HLA 65 and HLA 66, this lockwasher helps preserve machine reliability, cutting accuracy, and user safety by maintaining correct clamping force across key fixings.
Key Features:
- Genuine Stihl OEM part (4859 640 8900) for assured compatibility and fit
- Helps prevent fasteners backing off due to vibration and torque loads
- Durable steel construction for long service life in demanding use
- Supports safe operation by maintaining correct fastening integrity
- Direct replacement for worn or missing lockwashers during servicing
- Easy to install with standard hand tools; no modifications required
- Suitable for routine maintenance to keep hedge trimmers performing well
Typical Applications:
Used wherever Stihl specifies a locking washer on long‐reach hedge trimmers, particularly on assemblies exposed to vibration. Common during blade drive, handle, guard, or housing reassembly, and whenever a fastener is removed for service. Helps maintain consistent clamping force to reduce loosening and prevent premature wear.
Also known as:
Lock washer, locking washer, safety washer, spring washer, shakeproof washer, anti-vibration washer.
Fits Models:
HLA 65, HLA 66, HLA 85, HLA 86
Alternate Part Numbers:
4859 640 8900, 4859-640-8900, 48596408900
Product Specifications
| L&S Part No. | 4859 640 8900 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 48596408900 |
| Unit of Sale | 1 |
| Applications | HLA 65, HLA 66, HLA 85 Hedge, HLA 86, HLA65, HLA66, HLA86 |
| Machine Type | Long Reach Hedgetrimmers |
| Fits Brands | Stihl |
| Fits Models | HLA 66 | HLA 85 Hedge | HLA 86 | HLA 65 |
