Genuine STIHL 40037138301 Trimmer Head Eyelet / Sleeve – AutoCut & Brushcutter Head Part

The Genuine STIHL 40037138301 is a small but essential part inside the AutoCut / trimmer head assembly — typically used as a trimmer head eyelet or sleeve. It holds the nylon cutting line securely within the mowing head and allows smooth feeding of line during operation.

These are often replaced as part of service or during head rebuilds, especially if worn or damaged from line feed or debris impact. OEM STIHL parts help maintain reliable head performance and reduce downtime.

Models & Assemblies It Typically Fits

• Often associated with STIHL mowing heads such as:
• AutoCut 25-2
• AutoCut 30-2
• AutoCut 40-2
• AutoCut 40-4
• Brushcutter heads on selected FS/KM machines