Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2107SDA6A found under Indicator Heading Gyroscopic by Aar Brooks And Perkins Corp. The National Stock Number assigned to this part is 6610000287401, and the Federal Supply Class is 6610 Flight Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2107SDA6A.