Products Description
MS660 Chainsaw Screw M4x10 – Spline Screw for Stihl MS650 & MS660
Direct Replacement Fastener for Professional STIHL Chainsaws
This M4x10 screw is an essential replacement fastener for specific applications on STIHL MS660 and MS650 chainsaws. It is available in the factory original Torx/spline head design (replacing OEM 9022-341-0650) and features a precision M4 metric thread and 10mm length . This robust steel screw is engineered to withstand the high-vibration environment of professional saws, providing secure fastening for components like the rewind starter . A quality aftermarket part offers a reliable and cost-effective solution for maintenance or restoration projects.
Technical Profiles & Materials
Precision Fitment – Direct replacement for OEM part number 9022-341-0650, which is specified for the rewind starter assembly on Stihl MS660 and MS650 models .
Durable Construction – Manufactured from robust materials designed to withstand the demanding conditions of chainsaw operation, ensuring secure fastening and long service life .
Torx/Spline Head – The spline (Torx) design provides secure fastening and minimizes the risk of stripping, which is critical in high-vibration applications .
Wide Application – While specifically for the MS660/MS650 series, it's a common part for many modern Stihl models. The correct thread pitch for an M4 bolt is 0.70mm .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part No. | 9022-341-0650 |
| 2 | Thread Size | M4 x 10mm |
| 3 | Thread Pitch | 0.70mm |
| 4 | Drive Type | Spline screw (Torx) |
| 5 | Material | Durable steel |
| 6 | Compatible Models | Stihl 066, FH75, MS650, MS660 |
Products Application
Rewind Starter Assembly Fastening
This M4x10 screw is a critical component for securing the rewind starter assembly on MS660 and MS650 models. When original screws are stripped, lost, or damaged during starter service, replacing them with this direct-fit fastener ensures the starter mechanism remains securely mounted and functions reliably .
Carburetor & Intake Manifold Mounting
In some professional Stihl saws, this M4x10 screw is used to fasten the carburetor or intake manifold components. Replacing worn or missing screws during a carburetor rebuild ensures an airtight seal, preventing vacuum leaks that cause lean running conditions and potential engine damage .
General Maintenance & Engine Rebuilds
This screw is a common item in parts kits and is used for general fastening tasks during routine maintenance or full rebuilds. It is a vital part of a workshop's inventory for these saws. When performing a comprehensive engine overhaul, having the correct M4x10 screws on hand ensures all components are properly secured to factory specifications.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this screw fits my MS660?
A:Check your chainsaw model number on the housing. This M4x10 screw is designed for STIHL MS660, MS650, and 066 models . It replaces OEM part number 9022-341-0650. Verify the thread size (M4) and length (10mm) match the screw you are replacing.
Q: What is the difference between M4x10 and other M4 screws used on Stihl saws?
A: M4x10 refers to the thread size (M4 diameter) and length (10mm). The thread pitch for an M4 bolt is 0.70mm . This screw has a spline (Torx) head designed for high-torque applications. Other M4 screws may differ in length, head type, or material. Always verify the OEM part number (9022-341-0650) to ensure correct fitment for the rewind starter application.
Q: What is the MOQ and lead time?
A: MOQ: 100 PCS. Delivery: 7-14 days. Neutral export carton packaging. OEM and aftermarket options are available upon request.
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