Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 107A100-2551-25KC found under Crystal Unit Quartz by Industrial Radio Corp. The National Stock Number assigned to this part is 5955006428107, and the Federal Supply Class is 5955 Oscillators And Piezoelectric Crystals. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 107A100-2551-25KC.