Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 021.450 492 found under Valve Filling by Aim Infrarot Module Gmbh. The National Stock Number assigned to this part is 4820123190677, 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 021.450 492.