This fuel tank cap (part number 951-12179C) is for lawn tractors.
Fuel tank cap 951-12179C covers and protects the opening in the fuel tank.
Follow the instructions in the owner's manual when installing this part.
951-12179C (or 751-12179)
The manufacturer substituted part 751-12179 with this new part 951-12179C
Lawn & Garden/Yard/Farm