Description
Overview:
This Exhaust Lock Nut is a genuine Husqvarna spare designed to secure the exhaust/muffler assembly on heavy-duty disc cutters. Made from durable steel, the all‐metal hex nut holds fast under engine vibration and heat, keeping the exhaust firmly in place to prevent leaks and movement during demanding work. It is intended for Husqvarna petrol cut-off saws, including the K1250 and K1250 Rail, where reliable fastening of the exhaust is essential for performance and safety. As a Genuine Part (OEM 503 22 20 07), it offers assured compatibility and dependable fitment on the specified models. Ideal for routine servicing or replacing a worn or missing nut, it helps maintain the correct clamp load on the exhaust so the machine operates efficiently.
Key Features:
- Genuine Husqvarna part (OEM 503 22 20 07) for assured compatibility
- All‐metal hex lock nut designed to resist loosening under vibration
- Durable steel construction for long service life in harsh cutting environments
- Suitable for high-temperature areas around the exhaust/muffler
- Accurate fit to help prevent exhaust leaks and maintain engine performance
- Quick to install using standard hand tools, minimising downtime
- Reliable choice for scheduled maintenance and exhaust refits
- Supports safe operation by keeping the exhaust system securely fixed
Typical Applications:
Used when fitting or refitting the exhaust on Husqvarna disc cutters during maintenance, after decarbonising, engine repairs, or when a nut has been lost or damaged. Suitable for construction, demolition, concrete and stone cutting, and rail work where machines such as the K1250 family encounter sustained vibration and heavy loads.
Also known as:
Exhaust fixing nut, exhaust retaining nut, exhaust fastener, muffler nut, prevailing‐torque nut (all‐metal), hex nut for exhaust mountings, exhaust clamp nut, exhaust system nut.
Fits Models:
3120K, 3120K EPA, K1250, K1250 Active, K1250 Rail
Alternate Part Numbers:
503 22 20-07, 503222007
Product Specifications
| L&S Part No. | 503 22 20 07 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 505420401 |
| Unit of Sale | 1 |
| Machine Type | Disc Cutters |
| Fits Brands | Husqvarna |
| Key Features | - Genuine Husqvarna part for assured compatibility - All-metal hex nut resists loosening under vibration - Durable steel construction for long service life - Suitable for high-temperature exhaust areas - Accurate fit prevents exhaust leaks and maintains performance |
| Fits Models | K1250 | K1250 Active | K1250 Rail | 3120K |
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