Description
Overview:
The Square Nut for Stihl FS 400 and FS 450 is a genuine Stihl fastener designed to secure components within compatible brushcutters and blowers. It is a square-profile metal nut that seats firmly in matching recesses to prevent spinning, helping you achieve a reliable clamp with a standard bolt or screw. Built for everyday use in demanding environments, it supports routine maintenance and repairs on professional and domestic machines. Supplied under OEM/MPN 4128 791 9800, this part ensures correct fit and dependable performance in Stihl equipment. Being a Genuine Stihl part, it offers the assurance of factory specification, consistent quality, and compatibility across listed models.
Key Features:
- Genuine Stihl part for correct fit and compatibility (MPN 4128 791 9800)
- Square profile grips recesses to resist rotation during tightening
- Robust metal construction for dependable, long service life
- Helps maintain secure assemblies under vibration typical of brushcutters and blowers
- Smooth, consistent threads for reliable fastening and reassembly
- Suitable for various Stihl machines, supporting efficient maintenance
- Simple to install with basic hand tools
- Matches OEM specification to protect performance and safety
Typical Applications:
Used wherever a square nut is specified on compatible Stihl brushcutters and blowers, such as securing covers, guards, handle assemblies, housings, and brackets. Ideal for routine servicing, part replacement, and restoring machines after wear, vibration, or accidental damage in landscaping, groundskeeping, and construction settings.
Also known as:
Square nut, square fastener, square-profile nut, fastening nut, hardware nut, seating nut for recessed slots, retention nut.
Fits Models:
BGA 300.0, BGA 300.1, BGA3000, BGA3001, BR 350, BR 430, BR 450, BR 450C, BR 500, BR 550, BR 600, BR 700, FS 300, FS 310, FS 311, FS 350, FS 380, FS 400, FS 450, FS 480
Alternate Part Numbers:
4128-791-9800, 41287919800
Product Specifications
| L&S Part No. | 4128 791 9800 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41287919800 |
| Unit of Sale | 1 |
| Applications | BGA 300.0, BGA 300.1, BGA300.0, BGA300.1, BGA3000, BGA3001, BR 350, BR 430, BR 450, BR 450C, BR 500, BR 550, BR 600, BR 700, BR350, BR430, BR450, BR450C, BR500, BR550, BR600, BR700, FS 300, FS 310, FS 311, FS 350, FS 380, FS 400, FS 450, FS 480, FS300, FS310, FS311, FS350, FS380, FS400, FS450, FS480 |
| Machine Type | Brushcutters, Backpack Blowers |
| Fits Brands | Stihl |
| Fits Models | FS300, FS350, FS380 | FS310 | FS400, FS450, FS480 | BR350, BR430, BR450 | BR500 | FS311 | BR430 | BR450, BR450C | BR550 | BR600 | BR700 | BGA300.0 | BGA300.1 |
