120-475R013 (1990) MTD Lawn Mower

This is a TT screw, but it is also called a fastener, and it is used on multiple outdoor tools. This part is a Tri-Round or Tri-Lobular thread forming screw, it is 0.25 inches in diameter, 0.5 inches ...

This lock washer is used to resist the loosening of bolted joints. Repair tip: It is difficult to install the lock washer in a tight place or when the bolt/screw is pointing down. This lock works with...