Can't find 40 ppm 16MHz Crystal

Can't find 40 ppm 16MHz Crystalhttps://devzone.nordicsemi.com/f/nordic-q-a/21422/can-t-find-40-ppm-16mhz-crystalHi officially for the nrf51 chip, 40 ppm frequency tolerance recommended but I'm not able to find this much of tolerance in digikey. The only matching crystal digikey crystal but it has 15 ppm tolerance. If I use this how it will effect my customen-USTelligent Community 13Tue, 18 Apr 2017 06:02:41 GMTRE: Can't find 40 ppm 16MHz Crystalhttps://devzone.nordicsemi.com/thread/84017?ContentTypeID=1Tue, 18 Apr 2017 06:02:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3a25386f-76c8-498d-a77c-6c52d58957baRK<p>As long as the tolerance is BETTER than 40ppm it'll be fine, 40 is the minimum tolerance. So 15ppm will of course work perfectly.</p><div style="clear:both;"></div>