Chainsaw worm screw Stihl 021, 025, MS170, MS250...

Chainsaw oil pump sprocket Stihl 021, 025, MS170, MS250...

New grease pump drive gear suitable for Stihl chainsaw 021, 025, MS170, MS250...

Technical characteristics and dimensions of the worm

• Brand: generic
• Materials: steel, plastic and brass
• Colors: black, white and golden yellow

• Inner diameter: 15 mm
• Thread Diameter: 23 mm
• Thread pitch: 2.30 (11G)
• Thickness: 13.5 mm

• External diameter of the circlip: 27 mm
• Circlip length: 49 mm
• Circlip Thickness: 2mm

This worm screw is equivalent to the original OEM references:
Stihl: 1123 640 7102, 1123-640-7102, 11236407102, 1123-640-7105, 11236407105, 1123 640 7105

Applications:

Stihl: 021, 023, 025, MS170, MS171, MS180, MS181, MS210, MS230, MS231, MS250, MS251