Camco Replacement Thumbscrew and Nut for Propane Tank Cover Lid is a genuine replacement part, ideal for replacing the hardware on your propane tank lid assembly without having to replace the entire unit. Camco replacement parts are durable and easy to use, and save you time and money. The lid assembly hardware features two nuts and two bolts. Camco Replacement Thumbscrew and Nut for Propane Tank Cover Lid is a genuine replacement part, ideal for replacing the hardware on your propane tank lid assembly without having to replace the entire unit. Camco replacement parts are durable and easy to use, and save you time and money. The lid assembly hardware features two nuts and two bolts.