Description
Overview:
This Self-Tapping Screw 3.9x13 is a Genuine Stihl OEM fastener designed for secure, reliable fixing in high-vibration tools such as chainsaws. Made from durable steel with a corrosion-resistant finish, it forms its own thread as it is driven, giving a firm hold in plastics and softer metals commonly used in housings and covers. Sized 3.9 mm x 13 mm (approx 0.15 in x 0.51 in), it suits maintenance and repairs on popular models including the Stihl 034 and 036. The screw helps maintain equipment integrity by providing a repeatable, tight fit without the need for a pre-cut thread. Manufacturer Part Number: 9099 021 2770. A practical choice for workshop or site use where quick, dependable fastening is required on Stihl machinery.
Key Features:
- Genuine Stihl OEM part for correct fit and dependable performance
- Self-tapping design forms threads during installation, saving time
- 3.9 mm x 13 mm size (approx 0.15 in x 0.51 in) for common Stihl assemblies
- Steel construction with corrosion-resistant finish for durability
- Secure hold in plastics and softer alloys used in chainsaw housings and covers
- Suitable for vibration-prone applications to help maintain fastener retention
- Ideal for routine maintenance and on-site repairs
- Supports consistent reassembly without specialist tools
Typical Applications:
Used to fasten shrouds, recoil starter covers, air filter housings, handle frames, clutch or chain brake covers, and other small fittings on Stihl chainsaws. Useful wherever a clean, reliable thread is needed in plastic or light alloy components during servicing or part replacement.
Also known as:
Self-threading screw, tapping screw, thread-forming screw, self-cutting screw, auto-tapping screw. Commonly used as a service fastener for plastic housings and light-metal components on handheld outdoor power equipment.
Fits Models:
009, 021, 023, 024, 025, 026, 028, 028AV, 034, 036, 036QS, 038, 046, 056, 070, 084, 088, 090, 090G, MS171, MS171C, MS181, MS181C, MS210, MS210C, MS211, MS211C, MS230, MS230C, MS240, MS250, MS250C, MS260, MS260C, MS270, MS270C, MS280, MS280C, MS340, MS360, MS360C, MS380, MS440, MS460, MS461, MS780, MS880, MS881
Alternate Part Numbers:
9099-021-2770, 90990212770
Product Specifications
| L&S Part No. | 9099 021 2770 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 90990212770 |
| Unit of Sale | 1 |
| Applications | 009, 021, 023, 024, 025, 026, 028, 028AV, 034, 036, 036QS, 038, 046, 056, 070, 084, 088, 090, 090G, MS171, MS171C, MS181, MS181C, MS210, MS210C, MS211, MS211C, MS230, MS230C, MS240, MS250, MS250C, MS260, MS260C, MS270, MS270C, MS280, MS280C, MS340, MS360, MS360C, MS380, MS440, MS460, MS461, MS780, MS880, MS881 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS230, MS230C | MS250, MS250C | MS260, MS260C | MS270, MS270C, MS280, MS280C | 028, 028AV | MS440 | MS460 | MS240 | MS340 | MS360, MS360C | MS380 | MS171, MS171C | MS181, MS181C | MS211, MS211C | 009 | 021, 023, 025 | 024 | 026 | 034 | MS461 | MS780 | MS880 | 036 | 036QS | 038 | 046 | 056 | 070 | 084 | 088 | 090, 090G | MS881 |
