Oil Tank Filler Cap and Stainless Bung 

From BUNGKING.COM

Kit Contains:

- (1) Aluminum non-vented tank filler cap and o-ring seal

- (1) Weld in Stainless Steel bung, tapped to 1 1/4" x 8

Description:

-OD of the cap is 1.5"

-OD of the largest section of the bung is 1.75" the stepped down section measures 1.5"

We also carry vented caps for oil tank projects