Replacement Cap and Chain Only, for 2" Deck Fills - Attwood

I requested when ordering that I would need the key if it wasn't included. When the cap didn't fit I requested to purchase the correct base for this cap the key I was told I needed the part numbers. I found them elsewhere.

I own a 2004 Tropi-cal Motorhome. The diesel fill cap is the same as used on boats. This cap worked perfectly. I searched and searched in motorhome parts and supplies with no luck. National the motorhome manufacturer is no longer in business. Thanks for a great product.