Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 520S0002-1A found under Body Valve by Air Cruisers Company Llc. The National Stock Number assigned to this part is 4820013403375, 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 520S0002-1A.