Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 197020-01 found under Tn500 Unitr 4100 02 by Exelis Inc. The National Stock Number assigned to this part is 1560015512206, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 197020-01.