Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number YH275-2A1-00MHZ found under Calibrator Frequency by Greenray Industries Inc. The National Stock Number assigned to this part is 6625004597536, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like YH275-2A1-00MHZ.