Collar nut M10x1 l/h thread
Genuine Stihl Part
OEM Part No. 4126 642 7600

Suitable for the following Stihl Machines:
FS36, FS44, FS55, FS55C, FS55R, FS55RC, FS55T, FS120, FS120R, FS200, FS200R, FS250, FS250R, FS56, FS56C, FS56R, FS56RC, FS88, FS-KM, FS25-4, FS65-4, FR108, FS100, FS100R, FS100RX, FS110, FS110R, FS110X, FS110RX, FS72, FS74, FS76, FS75, FS80, FS80R, FS94C