This is a 5×16 torx head screw with an integrated washer, used in the upper and lower position for Mk5 GTi / Jetta grilles.
The GENUINE part, as sold new by the dealer.
Part #’s
N10-354-602 / N10 354 602 / N10354602
N10-354-601 / N10 354 601 / N10354601