This Ni Nut-Lock, or Nylock Nut, is a Silver 1/4 x 20 metal nut. Sold individually, it can be adjusted using a wrench or socket and torque wrench to the manufacturer specfications, and is used to secure the sheer pin in place, on the impeller assembly. These nuts are a one-time use part due to their locking mechanism. You'll know the nut...Read more has broken when it appears to have damaged threads or rounded off edges.
Customers found this to be an easy repair.
It is a genuine manufacturer-approved replacement part which is produced for use with Toro and Lawn Boy lawn and garden equipment. This special screw has a few several applications depending on the model of your equipment, please make sure to check appropriate diagrams for correct location and use of this hardware. It is a high-quality item which is made of durable metal and it is sold individually.