Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B300-265-7 109 found under Light Switch by Environmental Technology Inc. The National Stock Number assigned to this part is 5999013519236, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B300-265-7 109.