1-1/2" Steel Flush Head Hole Plugs HLPLG-098 (6 pcs.)

Diameter: 1-1/2"
Diameter 2: 1.63"
Thickness: .41"
Material: Steel
Head Style: Flush
Type: Hole Plug
Application: 1-1/2" hole

Box of 6.

Hole plugs are used to cover a hole to prevent debris from entering.