Description
Overview:
This Collar Nut M14 x 1.5 with left‐hand thread is a genuine Stihl part designed to secure cutting attachments on professional brushcutters and clearing saws such as the FS 500 and FS 550. Manufactured from robust steel with a protective finish, it provides dependable clamping force on rotating assemblies. The left‐hand (LH) thread matches the direction of rotation to resist loosening in service, helping protect the gearbox spindle and attachment. Its collar/washer face spreads the load evenly to reduce marking of guards and hubs. Ideal for routine maintenance and repairs, it restores safe, reliable operation when the original fastener is worn, damaged, or missing, and integrates cleanly with OEM assemblies on compatible Stihl FS series machines.
Key Features:
- Genuine Stihl OEM part for assured fit and compatibility
- M14 x 1.5 left‐hand thread for secure retention on rotating shafts
- Durable steel construction for long service life
- Collar/flanged face to distribute clamping load and protect components
- Resists loosening under vibration and heavy use
- Hex profile for quick fitting with a standard spanner
- Suited to high‐speed brushcutter and clearing saw applications
- Direct like‐for‐like replacement to simplify maintenance
Typical Applications:
Securing metal blades or mowing heads to the gearbox output shaft on Stihl brushcutters and clearing saws. Used during blade changes, routine servicing, or when replacing a lost or damaged nut. Suitable for landscaping, grounds maintenance, forestry clearing, and site preparation where reliable attachment retention is essential.
Also known as:
Left‐hand hex nut, collar locknut, blade retaining nut, flanged nut, arbor nut, LH thread fastener, M14 x 1.5 LH nut.
Fits Models:
FS 360, FS 360 C, FS 410 C, FS 420, FS 420 L, FS 490 C, FS 500, FS 510 C, FS 550, FS 550 L, FS 560 C
Alternate Part Numbers:
4116-642-7601, 41166427601
Product Specifications
| L&S Part No. | 4116 642 7601 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41166427601 |
| Unit of Sale | 1 |
| Applications | FS 360, FS 360 C, FS 410 C, FS 420, FS 420 L, FS 490 C, FS 500, FS 510 C, FS 550, FS 550 L, FS 560 C, FS360, FS360C, FS410C, FS420, FS420L, FS490C, FS500, FS510C, FS550, FS550L, FS560C |
| Machine Type | Brushcutters |
| Fits Brands | Stihl |
| Fits Models | FS360C FS410C | FS500, FS550, FS550L | FS360, FS420, FS420L (older models) | FS490C, FS510C, FS560C | FS561 C-EM |
