Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 208843 20 found under Parts Kit Pressure Regulating Va by L 3 Communications Corporation. The National Stock Number assigned to this part is 4820013002690, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 208843 20.