Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21A0033 found under Capacitor Fixed Mic by Siemens Energy And Automation Inc. The National Stock Number assigned to this part is 5910010448564, and the Federal Supply Class is 5910 Capacitors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21A0033.