Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS4000-04 found under by Smc Pneumatics Uk Ltd. The National Stock Number assigned to this part is 4820012363027, 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 AS4000-04.