Description
Overview:
The Spline Screw IS‐M6x25 is a genuine Stihl OEM fastener designed for the secure assembly of Stihl chainsaws, including the MS 311 and MS 391. Made from high‐strength steel with a corrosion‐resistant finish, it provides dependable clamping force in vibration‐prone applications. The internal spline drive offers positive tool engagement to reduce cam‐out and damage to the screw head during fitting or removal. Sized at M6 x 25 mm (6 mm diameter x 25 mm length), it is suitable for a range of chassis and cover fixings where a robust, repeatable connection is required. Manufactured to Stihl's specifications under MPN 1140 022 9500, this screw helps maintain the integrity and reliability of your machine during routine servicing and component replacement.
Key Features:
- Genuine Stihl OEM part for precise fit and compatibility
- M6 x 25 mm sizing matches factory specifications for the intended assemblies
- Internal spline drive for secure grip and reduced tool slippage
- Hardened steel construction for strength under load and vibration
- Corrosion‐resistant finish to support longer service life
- Clean, accurate threads for consistent tightening and seating
- Suitable for routine maintenance and like‐for‐like replacement of worn or missing screws
- Helps maintain alignment and structural integrity of mated components
- Easy to fit with the correct spline driver; removes cleanly for servicing
- Supports reliable performance of the saw by keeping key parts firmly secured
Typical Applications:
Used to fasten structural and protective components on compatible Stihl chainsaws, such as covers, guards, brackets, or frame points specified by the manufacturer. Ideal for restoring original fixings during maintenance, repairing damaged threads with a correct‐spec replacement, or replacing lost screws to prevent vibration‐related loosening and wear.
Also known as:
Internal spline screw, spline bolt, M6 x 25 machine screw, metric fixing, OEM fastener, cap screw, chainsaw fixing screw, IS screw, metric bolt for chainsaws.
Fits Models:
MS 311, MS 391
Alternate Part Numbers:
1140-022-9500, 11400229500
