An assortment of SAE & metric automotive drain plugs from The Hillman Group. Auto drain plugs secure the drain hole in the oil pan. These are an affordable and effective way to prevent fluid leaks. SAE variants all feature fine 1/2"-20 screw thread. Metric variants range from M12-1.25 to M20-1.50 in fine & coarse thread sizes. Full assortments of #58512 contain nine (9) refills comprised of Hillman item numbers #58513 - #58521.