Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F40 T12 AB found under Lamp Fluorescent by Morning Star Industries Inc. The National Stock Number assigned to this part is 6240014243079, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F40 T12 AB.