Make sure you haven't got the discount earlier.
![Customer Service Representative](https://partselectcom-gtcdcddbene3cpes.z01.azurefd.net/images/csr-partdetail.jpg)
Nut 5/16-18 Centerlock 539990184
Fits your 424 Aerator!
Fits your 424 Aerator!
PartSelect Number PS9027412
Manufacturer Part Number 539990184
Manufactured by
Husqvarna
![Customer Service Representative](https://partselectcom-gtcdcddbene3cpes.z01.azurefd.net/images/csr-partdetail.jpg)