Spline Screw IS-M5x20 MS651, MS661
SKU: Stihl | ST-9022 399 1020
- Regular price
- £0.67 Ex VAT
- £0.80 Inc VAT
- Sale price
- £0.67 Ex VAT
- Regular price
-
- £0.00 £0.80 Inc VAT
Free Delivery Over £75 *
Worldwide Shipping from the UK
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Product information & specifications
STIHL Spline Screw IS-M5x20-12.9 – High-Tensile OEM Fastener (9022 399 1020)
This genuine STIHL Spline Screw IS-M5x20-12.9 (OEM No. 9022 399 1020) is a high-strength fastener engineered for securing critical components on professional chainsaws and cut-off saws. Manufactured from high-tensile alloy steel to strength class 12.9, it is designed to withstand heavy loads and continuous vibration in demanding environments.
With a metric M5 x 20 size, this screw provides a precise and compact fixing solution for assemblies requiring maximum strength and reliability. The internal spline drive ensures secure tool engagement, reducing cam-out and enabling accurate torque application during installation and servicing.
Key Features
- Genuine STIHL OEM part for precise fit and performance
- OEM part number 9022 399 1020 (also 9022-399-1020)
- High-tensile alloy steel construction – strength class 12.9
- M5 x 20 mm size for compact, high-strength assemblies
- Internal spline drive for secure torque transfer
- Designed for high-vibration and high-load environments
- Durable finish for wear resistance during repeated servicing
- Precision threads for consistent tightening and clamp load
Designed for High-Load Fastening
This spline screw is engineered to maintain secure assemblies under extreme conditions, helping prevent loosening and ensuring consistent alignment of critical components during operation.
Durable OEM Construction
Manufactured to STIHL’s exact specifications, the screw offers exceptional strength, fatigue resistance and durability, making it ideal for professional-grade machinery.
Compatibility and Application
This fastener is used across a range of STIHL professional chainsaws and cut-off saws. It is commonly replaced during servicing or repairs where a high-strength M5 fixing is required.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | STIHL Spline Screw IS-M5x20-12.9 |
| OEM Part Number | 9022 399 1020 |
| Alternate Part Numbers | 9022-399-1020, 90223991020 |
| Thread Size | M5 |
| Length | 20 mm |
| Strength Class | 12.9 |
| Drive Type | Internal spline |
| Material | High-tensile alloy steel |
Compatible Models
Fits STIHL models including:
MS 362, MS 362 C, MS 400 C, MS 500i, MS 651, MS 661, MS 661 C, MS 881, TS 480i, TS 500i, TSA 300.
Ideal For
- Professional chainsaw and cut-off saw maintenance
- Replacing high-strength fasteners in critical assemblies
- Securing engine covers, housings and structural components
- Workshop servicing and field repairs
- Maintaining safe and reliable machine operation
Best For
The STIHL Spline Screw IS-M5x20-12.9 is best for professional users who require a high-strength, OEM fastener for critical, high-load applications.
Why Choose the STIHL Spline Screw IS-M5x20-12.9?
Choosing a genuine STIHL high-tensile fastener ensures correct fit, strength and durability. It is essential for maintaining the integrity, safety and performance of professional-grade equipment.
STIHL Spline Screw IS-M5x20-12.9 – High-Tensile OEM Fastener (9022 399 1020)
This genuine STIHL Spline Screw IS-M5x20-12.9 (OEM No. 9022 399 1020) is a high-strength fastener engineered for securing critical components on professional chainsaws and cut-off saws. Manufactured from high-tensile alloy steel to strength class 12.9, it is designed to withstand heavy loads and continuous vibration in demanding environments.
With a metric M5 x 20 size, this screw provides a precise and compact fixing solution for assemblies requiring maximum strength and reliability. The internal spline drive ensures secure tool engagement, reducing cam-out and enabling accurate torque application during installation and servicing.
Key Features
- Genuine STIHL OEM part for precise fit and performance
- OEM part number 9022 399 1020 (also 9022-399-1020)
- High-tensile alloy steel construction – strength class 12.9
- M5 x 20 mm size for compact, high-strength assemblies
- Internal spline drive for secure torque transfer
- Designed for high-vibration and high-load environments
- Durable finish for wear resistance during repeated servicing
- Precision threads for consistent tightening and clamp load
Designed for High-Load Fastening
This spline screw is engineered to maintain secure assemblies under extreme conditions, helping prevent loosening and ensuring consistent alignment of critical components during operation.
Durable OEM Construction
Manufactured to STIHL’s exact specifications, the screw offers exceptional strength, fatigue resistance and durability, making it ideal for professional-grade machinery.
Compatibility and Application
This fastener is used across a range of STIHL professional chainsaws and cut-off saws. It is commonly replaced during servicing or repairs where a high-strength M5 fixing is required.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | STIHL Spline Screw IS-M5x20-12.9 |
| OEM Part Number | 9022 399 1020 |
| Alternate Part Numbers | 9022-399-1020, 90223991020 |
| Thread Size | M5 |
| Length | 20 mm |
| Strength Class | 12.9 |
| Drive Type | Internal spline |
| Material | High-tensile alloy steel |
Compatible Models
Fits STIHL models including:
MS 362, MS 362 C, MS 400 C, MS 500i, MS 651, MS 661, MS 661 C, MS 881, TS 480i, TS 500i, TSA 300.
Ideal For
- Professional chainsaw and cut-off saw maintenance
- Replacing high-strength fasteners in critical assemblies
- Securing engine covers, housings and structural components
- Workshop servicing and field repairs
- Maintaining safe and reliable machine operation
Best For
The STIHL Spline Screw IS-M5x20-12.9 is best for professional users who require a high-strength, OEM fastener for critical, high-load applications.
Why Choose the STIHL Spline Screw IS-M5x20-12.9?
Choosing a genuine STIHL high-tensile fastener ensures correct fit, strength and durability. It is essential for maintaining the integrity, safety and performance of professional-grade equipment.
Delivery & Returns
UK Delivery
Fast, reliable delivery from our UK warehouse.
- FREE UK Standard Delivery
applies to eligible UK orders over £75 ex VAT.
Estimated delivery: 2–4 working days
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days
- Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.
UK Delivery
Fast, reliable delivery from our UK warehouse.
- FREE UK Standard Delivery
applies to eligible UK orders over £75 ex VAT.
Estimated delivery: 2–4 working days
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days
- Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.