Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FRS-C-1A8A4C found under Oscillator Noncrystal Controlled by Efratom Time And Frequency Products. The National Stock Number assigned to this part is 5955013821294, 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 FRS-C-1A8A4C.