1928-1930 Chevy chrome cap knurled Price $65.00 Prev Next Product Description Our 1928-1930 Chevy knurled radiator cap is machined out of brass here in the USA with US chrome plating. Why? Because we learned the hard way that Chinese steel caps have dodgy plating that pops off and flakes away. Problem solved! 2.5" internal threaded cap. Made in the USA.