Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 272990 found under Knob Brightness by Astronautics Corporation Of America. The National Stock Number assigned to this part is 1680016280172, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 272990.