Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 409-0031 found under Oven Electrical Ele by Cts Inc. The National Stock Number assigned to this part is 5955005380204, 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 409-0031.