Low profile quartz crystals through hole hc 49us ansen quartz as49s 6m fc200f3 a 6000000mhz through hole quartz crystal with a plusmn20ppm tolerance that has excellent frequency aging stability and high shock and heat resistance the device is suitable for a wide range of applications such as computers tablets laptops commnications devices etc 6mhz 20ppm hc 49us low profile crystal