Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5405-100-00K found under Oscillator Crystal Controlled by Mf Electronics Corp. The National Stock Number assigned to this part is 5955006263356, 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 5405-100-00K.