Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8505A OPTS 02B 03 09A found under Multimeter by Fluke Electronics Corp. The National Stock Number assigned to this part is 6625013972606, 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 8505A OPTS 02B 03 09A.