Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L5757 found under Oscillator Subassem by L3 Communications Corp. The National Stock Number assigned to this part is 5955011069826, 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 L5757.