Description
Overview:
The Union Nut for Stihl sprayers is a genuine Stihl part that secures key fluid connections on the machine. Made from tough, chemical‐resistant black polymer (high‐grade plastic), it provides a tight, reliable thread engagement to help prevent leaks and loosening under pressure. This nut is designed for Stihl compression and backpack sprayers, including SG 31 and SG 51, and is engineered to match the original thread profile for a precise fit. Use it to replace worn, split, or stripped nuts on hose, lance, trigger, or nozzle joints so your sprayer maintains consistent performance. Identified by MPN 4255 708 3106, it offers assured compatibility and dependable service life in landscaping, grounds maintenance, and agricultural spraying tasks.
Key Features:
- Genuine Stihl OEM part for consistent fit and performance
- Durable, chemical‐resistant polymer suited to pesticides, herbicides, and cleaners
- Accurate thread form for a snug, secure union with minimal risk of cross‐threading
- Helps prevent leaks at hose, lance, trigger, and nozzle connections
- Maintains working pressure and sprayer efficiency by keeping fittings tight
- Straightforward to fit with basic hand tools; no modifications required
- Direct replacement for MPN 4255 708 3106
Typical Applications:
Used to secure fluid line unions on Stihl sprayers, such as connecting the hose to the tank outlet or filter, attaching the lance to the trigger handle, or fixing nozzle assemblies. Suitable for routine maintenance or repair during weed control, disinfecting, fertilising, and general grounds care where a dependable, leak‐resistant connection is required.
Also known as:
Connector nut, coupling nut, hose union nut, spray lance nut, fitting nut, compression nut, retaining nut. These terms refer to the same threaded nut used to clamp and seal fluid connections on sprayer hoses, lances, and trigger assemblies.
Fits Models:
SG 31
SG 51
SG 71
SG31
SG51
SG71
Alternate Part Numbers:
4255-708-3106, 42557083106
Product Specifications
| L&S Part No. | 4255 708 3106 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42557083106 |
| Unit of Sale | 1 |
| Applications | SG 31, SG 51, SG 71, SG31, SG51, SG71 |
| Machine Type | Garden Sprinkler Systems |
| Fits Brands | Stihl |
| Fits Models | SG 31 | SG 51, SG 71 |
