Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CMU3521 found under Resistor Variable by Heico Ohmite Llc. The National Stock Number assigned to this part is 5905003511630, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CMU3521.