Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40S11N found under Lamp Incandescent by Wesco Distribution Inc. The National Stock Number assigned to this part is 6240002496061, 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 40S11N.