Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 111623-001 found under Oscillator Crystal by Aero Systems Engineering Inc. The National Stock Number assigned to this part is 5955013513798, 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 111623-001.