Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LF120 US found under Quadrant Damper Control by Belimo Aircontrols Usa Inc. The National Stock Number assigned to this part is 4520015034290, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LF120 US.