A silver rivet.
Toyota lists 90269-06013 as a fuel door rivet.
Sizes: 6mm hole, 13mm head.
OEM numbers: Toyota 90269-06013.
Fits Toyota.
Model years from the car maker's parts catalogue (US-market years; check your vehicle)
Scion xB 2004-2006
Toyota Camry 1997-2001
Toyota Corolla 2003-2008
Toyota Echo 2000-2005
Toyota Mirai 2016-2020
Toyota MR2 Spyder 2000-2005
Toyota Prius C 2012-2019
Toyota Sequoia 2008-2022
Toyota Yaris 2007-2012
Details
Toyota part number: 90269-06013, 9026906013
Hole Size: 29/128 " (5.8mm)
Flange Diameter: 67/128 " (13.2mm)
Rivet Length: 5/8 " (15.9mm)
Overall Length: 2 7/128 " (52.2mm)